fixes #427, static fields emitted outside the scope of their class

test/codegen/expect/collection/wrappers.js

-dart_library.library('collection/wrappers', null, /* Imports */[
-  'dart/_runtime',
-  'collection/src/canonicalized_map',
-  'dart/core',
-  'dart/math',
-  'dart/collection'
-], /* Lazy imports */[
-  'collection/src/unmodifiable_wrappers'
-], function(exports, dart, canonicalized_map, core, math, collection, unmodifiable_wrappers) {
-  'use strict';
-  let dartx = dart.dartx;
-  dart.export(exports, canonicalized_map);
-  dart.export(exports, unmodifiable_wrappers);
-  const _base = Symbol('_base');
-  const _DelegatingIterableBase$ = dart.generic(function(E) {
-    class _DelegatingIterableBase extends core.Object {
-      _DelegatingIterableBase() {
-      }
-      any(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        return this[_base][dartx.any](test);
-      }
-      contains(element) {
-        return this[_base][dartx.contains](element);
-      }
-      elementAt(index) {
-        return this[_base][dartx.elementAt](index);
-      }
-      every(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        return this[_base][dartx.every](test);
-      }
-      expand(f) {
-        dart.as(f, dart.functionType(core.Iterable, [E]));
-        return this[_base][dartx.expand](f);
-      }
-      get first() {
-        return this[_base][dartx.first];
-      }
-      firstWhere(test, opts) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        let orElse = opts && 'orElse' in opts ? opts.orElse : null;
-        dart.as(orElse, dart.functionType(E, []));
-        return this[_base][dartx.firstWhere](test, {orElse: orElse});
-      }
-      fold(initialValue, combine) {
-        dart.as(combine, dart.functionType(dart.dynamic, [dart.dynamic, E]));
-        return this[_base][dartx.fold](initialValue, combine);
-      }
-      forEach(f) {
-        dart.as(f, dart.functionType(dart.void, [E]));
-        return this[_base][dartx.forEach](f);
-      }
-      get isEmpty() {
-        return this[_base][dartx.isEmpty];
-      }
-      get isNotEmpty() {
-        return this[_base][dartx.isNotEmpty];
-      }
-      get iterator() {
-        return this[_base][dartx.iterator];
-      }
-      [Symbol.iterator]() {
-        return new dart.JsIterator(this.iterator);
-      }
-      join(separator) {
-        if (separator === void 0) separator = "";
-        return this[_base][dartx.join](separator);
-      }
-      get last() {
-        return this[_base][dartx.last];
-      }
-      lastWhere(test, opts) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        let orElse = opts && 'orElse' in opts ? opts.orElse : null;
-        dart.as(orElse, dart.functionType(E, []));
-        return this[_base][dartx.lastWhere](test, {orElse: orElse});
-      }
-      get length() {
-        return this[_base][dartx.length];
-      }
-      map(f) {
-        dart.as(f, dart.functionType(dart.dynamic, [E]));
-        return this[_base][dartx.map](f);
-      }
-      reduce(combine) {
-        dart.as(combine, dart.functionType(E, [E, E]));
-        return this[_base][dartx.reduce](combine);
-      }
-      get single() {
-        return this[_base][dartx.single];
-      }
-      singleWhere(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        return this[_base][dartx.singleWhere](test);
-      }
-      skip(n) {
-        return this[_base][dartx.skip](n);
-      }
-      skipWhile(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        return this[_base][dartx.skipWhile](test);
-      }
-      take(n) {
-        return this[_base][dartx.take](n);
-      }
-      takeWhile(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        return this[_base][dartx.takeWhile](test);
-      }
-      toList(opts) {
-        let growable = opts && 'growable' in opts ? opts.growable : true;
-        return this[_base][dartx.toList]({growable: growable});
-      }
-      toSet() {
-        return this[_base][dartx.toSet]();
-      }
-      where(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        return this[_base][dartx.where](test);
-      }
-      toString() {
-        return dart.toString(this[_base]);
-      }
-    }
-    _DelegatingIterableBase[dart.implements] = () => [core.Iterable$(E)];
-    dart.setSignature(_DelegatingIterableBase, {
-      constructors: () => ({_DelegatingIterableBase: [_DelegatingIterableBase$(E), []]}),
-      methods: () => ({
-        any: [core.bool, [dart.functionType(core.bool, [E])]],
-        contains: [core.bool, [core.Object]],
-        elementAt: [E, [core.int]],
-        every: [core.bool, [dart.functionType(core.bool, [E])]],
-        expand: [core.Iterable, [dart.functionType(core.Iterable, [E])]],
-        firstWhere: [E, [dart.functionType(core.bool, [E])], {orElse: dart.functionType(E, [])}],
-        fold: [dart.dynamic, [dart.dynamic, dart.functionType(dart.dynamic, [dart.dynamic, E])]],
-        forEach: [dart.void, [dart.functionType(dart.void, [E])]],
-        join: [core.String, [], [core.String]],
-        lastWhere: [E, [dart.functionType(core.bool, [E])], {orElse: dart.functionType(E, [])}],
-        map: [core.Iterable, [dart.functionType(dart.dynamic, [E])]],
-        reduce: [E, [dart.functionType(E, [E, E])]],
-        singleWhere: [E, [dart.functionType(core.bool, [E])]],
-        skip: [core.Iterable$(E), [core.int]],
-        skipWhile: [core.Iterable$(E), [dart.functionType(core.bool, [E])]],
-        take: [core.Iterable$(E), [core.int]],
-        takeWhile: [core.Iterable$(E), [dart.functionType(core.bool, [E])]],
-        toList: [core.List$(E), [], {growable: core.bool}],
-        toSet: [core.Set$(E), []],
-        where: [core.Iterable$(E), [dart.functionType(core.bool, [E])]]
-      })
-    });
-    dart.defineExtensionMembers(_DelegatingIterableBase, [
-      'any',
-      'contains',
-      'elementAt',
-      'every',
-      'expand',
-      'firstWhere',
-      'fold',
-      'forEach',
-      'join',
-      'lastWhere',
-      'map',
-      'reduce',
-      'singleWhere',
-      'skip',
-      'skipWhile',
-      'take',
-      'takeWhile',
-      'toList',
-      'toSet',
-      'where',
-      'toString',
-      'first',
-      'isEmpty',
-      'isNotEmpty',
-      'iterator',
-      'last',
-      'length',
-      'single'
-    ]);
-    return _DelegatingIterableBase;
-  });
-  let _DelegatingIterableBase = _DelegatingIterableBase$();
-  const DelegatingIterable$ = dart.generic(function(E) {
-    class DelegatingIterable extends _DelegatingIterableBase$(E) {
-      DelegatingIterable(base) {
-        this[_base] = base;
-        super._DelegatingIterableBase();
-      }
-    }
-    dart.setSignature(DelegatingIterable, {
-      constructors: () => ({DelegatingIterable: [DelegatingIterable$(E), [core.Iterable$(E)]]})
-    });
-    return DelegatingIterable;
-  });
-  let DelegatingIterable = DelegatingIterable$();
-  const _listBase = Symbol('_listBase');
-  const DelegatingList$ = dart.generic(function(E) {
-    class DelegatingList extends DelegatingIterable$(E) {
-      DelegatingList(base) {
-        super.DelegatingIterable(base);
-      }
-      get [_listBase]() {
-        return dart.as(this[_base], core.List$(E));
-      }
-      get(index) {
-        return this[_listBase][dartx.get](index);
-      }
-      set(index, value) {
-        dart.as(value, E);
-        this[_listBase][dartx.set](index, value);
-        return value;
-      }
-      add(value) {
-        dart.as(value, E);
-        this[_listBase][dartx.add](value);
-      }
-      addAll(iterable) {
-        dart.as(iterable, core.Iterable$(E));
-        this[_listBase][dartx.addAll](iterable);
-      }
-      asMap() {
-        return this[_listBase][dartx.asMap]();
-      }
-      clear() {
-        this[_listBase][dartx.clear]();
-      }
-      fillRange(start, end, fillValue) {
-        if (fillValue === void 0) fillValue = null;
-        dart.as(fillValue, E);
-        this[_listBase][dartx.fillRange](start, end, fillValue);
-      }
-      getRange(start, end) {
-        return this[_listBase][dartx.getRange](start, end);
-      }
-      indexOf(element, start) {
-        dart.as(element, E);
-        if (start === void 0) start = 0;
-        return this[_listBase][dartx.indexOf](element, start);
-      }
-      insert(index, element) {
-        dart.as(element, E);
-        this[_listBase][dartx.insert](index, element);
-      }
-      insertAll(index, iterable) {
-        dart.as(iterable, core.Iterable$(E));
-        this[_listBase][dartx.insertAll](index, iterable);
-      }
-      lastIndexOf(element, start) {
-        dart.as(element, E);
-        if (start === void 0) start = null;
-        return this[_listBase][dartx.lastIndexOf](element, start);
-      }
-      set length(newLength) {
-        this[_listBase][dartx.length] = newLength;
-      }
-      remove(value) {
-        return this[_listBase][dartx.remove](value);
-      }
-      removeAt(index) {
-        return this[_listBase][dartx.removeAt](index);
-      }
-      removeLast() {
-        return this[_listBase][dartx.removeLast]();
-      }
-      removeRange(start, end) {
-        this[_listBase][dartx.removeRange](start, end);
-      }
-      removeWhere(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        this[_listBase][dartx.removeWhere](test);
-      }
-      replaceRange(start, end, iterable) {
-        dart.as(iterable, core.Iterable$(E));
-        this[_listBase][dartx.replaceRange](start, end, iterable);
-      }
-      retainWhere(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        this[_listBase][dartx.retainWhere](test);
-      }
-      get reversed() {
-        return this[_listBase][dartx.reversed];
-      }
-      setAll(index, iterable) {
-        dart.as(iterable, core.Iterable$(E));
-        this[_listBase][dartx.setAll](index, iterable);
-      }
-      setRange(start, end, iterable, skipCount) {
-        dart.as(iterable, core.Iterable$(E));
-        if (skipCount === void 0) skipCount = 0;
-        this[_listBase][dartx.setRange](start, end, iterable, skipCount);
-      }
-      shuffle(random) {
-        if (random === void 0) random = null;
-        this[_listBase][dartx.shuffle](random);
-      }
-      sort(compare) {
-        if (compare === void 0) compare = null;
-        dart.as(compare, dart.functionType(core.int, [E, E]));
-        this[_listBase][dartx.sort](compare);
-      }
-      sublist(start, end) {
-        if (end === void 0) end = null;
-        return this[_listBase][dartx.sublist](start, end);
-      }
-    }
-    DelegatingList[dart.implements] = () => [core.List$(E)];
-    dart.setSignature(DelegatingList, {
-      constructors: () => ({DelegatingList: [DelegatingList$(E), [core.List$(E)]]}),
-      methods: () => ({
-        get: [E, [core.int]],
-        set: [dart.void, [core.int, E]],
-        add: [dart.void, [E]],
-        addAll: [dart.void, [core.Iterable$(E)]],
-        asMap: [core.Map$(core.int, E), []],
-        clear: [dart.void, []],
-        fillRange: [dart.void, [core.int, core.int], [E]],
-        getRange: [core.Iterable$(E), [core.int, core.int]],
-        indexOf: [core.int, [E], [core.int]],
-        insert: [dart.void, [core.int, E]],
-        insertAll: [dart.void, [core.int, core.Iterable$(E)]],
-        lastIndexOf: [core.int, [E], [core.int]],
-        remove: [core.bool, [core.Object]],
-        removeAt: [E, [core.int]],
-        removeLast: [E, []],
-        removeRange: [dart.void, [core.int, core.int]],
-        removeWhere: [dart.void, [dart.functionType(core.bool, [E])]],
-        replaceRange: [dart.void, [core.int, core.int, core.Iterable$(E)]],
-        retainWhere: [dart.void, [dart.functionType(core.bool, [E])]],
-        setAll: [dart.void, [core.int, core.Iterable$(E)]],
-        setRange: [dart.void, [core.int, core.int, core.Iterable$(E)], [core.int]],
-        shuffle: [dart.void, [], [math.Random]],
-        sort: [dart.void, [], [dart.functionType(core.int, [E, E])]],
-        sublist: [core.List$(E), [core.int], [core.int]]
-      })
-    });
-    dart.defineExtensionMembers(DelegatingList, [
-      'get',
-      'set',
-      'add',
-      'addAll',
-      'asMap',
-      'clear',
-      'fillRange',
-      'getRange',
-      'indexOf',
-      'insert',
-      'insertAll',
-      'lastIndexOf',
-      'remove',
-      'removeAt',
-      'removeLast',
-      'removeRange',
-      'removeWhere',
-      'replaceRange',
-      'retainWhere',
-      'setAll',
-      'setRange',
-      'shuffle',
-      'sort',
-      'sublist',
-      'length',
-      'reversed'
-    ]);
-    return DelegatingList;
-  });
-  let DelegatingList = DelegatingList$();
-  const _setBase = Symbol('_setBase');
-  const DelegatingSet$ = dart.generic(function(E) {
-    class DelegatingSet extends DelegatingIterable$(E) {
-      DelegatingSet(base) {
-        super.DelegatingIterable(base);
-      }
-      get [_setBase]() {
-        return dart.as(this[_base], core.Set$(E));
-      }
-      add(value) {
-        dart.as(value, E);
-        return this[_setBase].add(value);
-      }
-      addAll(elements) {
-        dart.as(elements, core.Iterable$(E));
-        this[_setBase].addAll(elements);
-      }
-      clear() {
-        this[_setBase].clear();
-      }
-      containsAll(other) {
-        return this[_setBase].containsAll(other);
-      }
-      difference(other) {
-        dart.as(other, core.Set$(E));
-        return this[_setBase].difference(other);
-      }
-      intersection(other) {
-        return this[_setBase].intersection(other);
-      }
-      lookup(element) {
-        return this[_setBase].lookup(element);
-      }
-      remove(value) {
-        return this[_setBase].remove(value);
-      }
-      removeAll(elements) {
-        this[_setBase].removeAll(elements);
-      }
-      removeWhere(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        this[_setBase].removeWhere(test);
-      }
-      retainAll(elements) {
-        this[_setBase].retainAll(elements);
-      }
-      retainWhere(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        this[_setBase].retainWhere(test);
-      }
-      union(other) {
-        dart.as(other, core.Set$(E));
-        return this[_setBase].union(other);
-      }
-      toSet() {
-        return new (DelegatingSet$(E))(this[_setBase].toSet());
-      }
-    }
-    DelegatingSet[dart.implements] = () => [core.Set$(E)];
-    dart.setSignature(DelegatingSet, {
-      constructors: () => ({DelegatingSet: [DelegatingSet$(E), [core.Set$(E)]]}),
-      methods: () => ({
-        add: [core.bool, [E]],
-        addAll: [dart.void, [core.Iterable$(E)]],
-        clear: [dart.void, []],
-        containsAll: [core.bool, [core.Iterable$(core.Object)]],
-        difference: [core.Set$(E), [core.Set$(E)]],
-        intersection: [core.Set$(E), [core.Set$(core.Object)]],
-        lookup: [E, [core.Object]],
-        remove: [core.bool, [core.Object]],
-        removeAll: [dart.void, [core.Iterable$(core.Object)]],
-        removeWhere: [dart.void, [dart.functionType(core.bool, [E])]],
-        retainAll: [dart.void, [core.Iterable$(core.Object)]],
-        retainWhere: [dart.void, [dart.functionType(core.bool, [E])]],
-        union: [core.Set$(E), [core.Set$(E)]],
-        toSet: [core.Set$(E), []]
-      })
-    });
-    dart.defineExtensionMembers(DelegatingSet, ['toSet']);
-    return DelegatingSet;
-  });
-  let DelegatingSet = DelegatingSet$();
-  const _baseQueue = Symbol('_baseQueue');
-  const DelegatingQueue$ = dart.generic(function(E) {
-    class DelegatingQueue extends DelegatingIterable$(E) {
-      DelegatingQueue(queue) {
-        super.DelegatingIterable(queue);
-      }
-      get [_baseQueue]() {
-        return dart.as(this[_base], collection.Queue$(E));
-      }
-      add(value) {
-        dart.as(value, E);
-        this[_baseQueue].add(value);
-      }
-      addAll(iterable) {
-        dart.as(iterable, core.Iterable$(E));
-        this[_baseQueue].addAll(iterable);
-      }
-      addFirst(value) {
-        dart.as(value, E);
-        this[_baseQueue].addFirst(value);
-      }
-      addLast(value) {
-        dart.as(value, E);
-        this[_baseQueue].addLast(value);
-      }
-      clear() {
-        this[_baseQueue].clear();
-      }
-      remove(object) {
-        return this[_baseQueue].remove(object);
-      }
-      removeWhere(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        this[_baseQueue].removeWhere(test);
-      }
-      retainWhere(test) {
-        dart.as(test, dart.functionType(core.bool, [E]));
-        this[_baseQueue].retainWhere(test);
-      }
-      removeFirst() {
-        return this[_baseQueue].removeFirst();
-      }
-      removeLast() {
-        return this[_baseQueue].removeLast();
-      }
-    }
-    DelegatingQueue[dart.implements] = () => [collection.Queue$(E)];
-    dart.setSignature(DelegatingQueue, {
-      constructors: () => ({DelegatingQueue: [DelegatingQueue$(E), [collection.Queue$(E)]]}),
-      methods: () => ({
-        add: [dart.void, [E]],
-        addAll: [dart.void, [core.Iterable$(E)]],
-        addFirst: [dart.void, [E]],
-        addLast: [dart.void, [E]],
-        clear: [dart.void, []],
-        remove: [core.bool, [core.Object]],
-        removeWhere: [dart.void, [dart.functionType(core.bool, [E])]],
-        retainWhere: [dart.void, [dart.functionType(core.bool, [E])]],
-        removeFirst: [E, []],
-        removeLast: [E, []]
-      })
-    });
-    return DelegatingQueue;
-  });
-  let DelegatingQueue = DelegatingQueue$();
-  const DelegatingMap$ = dart.generic(function(K, V) {
-    class DelegatingMap extends core.Object {
-      DelegatingMap(base) {
-        this[_base] = base;
-      }
-      get(key) {
-        return this[_base].get(key);
-      }
-      set(key, value) {
-        dart.as(key, K);
-        dart.as(value, V);
-        this[_base].set(key, value);
-        return value;
-      }
-      addAll(other) {
-        dart.as(other, core.Map$(K, V));
-        this[_base].addAll(other);
-      }
-      clear() {
-        this[_base].clear();
-      }
-      containsKey(key) {
-        return this[_base].containsKey(key);
-      }
-      containsValue(value) {
-        return this[_base].containsValue(value);
-      }
-      forEach(f) {
-        dart.as(f, dart.functionType(dart.void, [K, V]));
-        this[_base].forEach(f);
-      }
-      get isEmpty() {
-        return this[_base].isEmpty;
-      }
-      get isNotEmpty() {
-        return this[_base].isNotEmpty;
-      }
-      get keys() {
-        return this[_base].keys;
-      }
-      get length() {
-        return this[_base].length;
-      }
-      putIfAbsent(key, ifAbsent) {
-        dart.as(key, K);
-        dart.as(ifAbsent, dart.functionType(V, []));
-        return this[_base].putIfAbsent(key, ifAbsent);
-      }
-      remove(key) {
-        return this[_base].remove(key);
-      }
-      get values() {
-        return this[_base].values;
-      }
-      toString() {
-        return dart.toString(this[_base]);
-      }
-    }
-    DelegatingMap[dart.implements] = () => [core.Map$(K, V)];
-    dart.setSignature(DelegatingMap, {
-      constructors: () => ({DelegatingMap: [DelegatingMap$(K, V), [core.Map$(K, V)]]}),
-      methods: () => ({
-        get: [V, [core.Object]],
-        set: [dart.void, [K, V]],
-        addAll: [dart.void, [core.Map$(K, V)]],
-        clear: [dart.void, []],
-        containsKey: [core.bool, [core.Object]],
-        containsValue: [core.bool, [core.Object]],
-        forEach: [dart.void, [dart.functionType(dart.void, [K, V])]],
-        putIfAbsent: [V, [K, dart.functionType(V, [])]],
-        remove: [V, [core.Object]]
-      })
-    });
-    return DelegatingMap;
-  });
-  let DelegatingMap = DelegatingMap$();
-  const _baseMap = Symbol('_baseMap');
-  const MapKeySet$ = dart.generic(function(E) {
-    class MapKeySet extends dart.mixin(_DelegatingIterableBase$(E), unmodifiable_wrappers.UnmodifiableSetMixin$(E)) {
-      MapKeySet(base) {
-        this[_baseMap] = base;
-        super._DelegatingIterableBase();
-      }
-      get [_base]() {
-        return this[_baseMap].keys;
-      }
-      contains(element) {
-        return this[_baseMap].containsKey(element);
-      }
-      get isEmpty() {
-        return this[_baseMap].isEmpty;
-      }
-      get isNotEmpty() {
-        return this[_baseMap].isNotEmpty;
-      }
-      get length() {
-        return this[_baseMap].length;
-      }
-      toString() {
-        return `{${this[_base][dartx.join](', ')}}`;
-      }
-      containsAll(other) {
-        return other[dartx.every](dart.bind(this, 'contains'));
-      }
-      difference(other) {
-        dart.as(other, core.Set$(E));
-        return this.where(dart.fn(element => !dart.notNull(other.contains(element)), core.bool, [E]))[dartx.toSet]();
-      }
-      intersection(other) {
-        return this.where(dart.bind(other, 'contains'))[dartx.toSet]();
-      }
-      lookup(element) {
-        dart.as(element, E);
-        return dart.throw(new core.UnsupportedError("MapKeySet doesn't support lookup()."));
-      }
-      union(other) {
-        dart.as(other, core.Set$(E));
-        return (() => {
-          let _ = this.toSet();
-          _.addAll(other);
-          return _;
-        })();
-      }
-    }
-    dart.setSignature(MapKeySet, {
-      constructors: () => ({MapKeySet: [exports.MapKeySet$(E), [core.Map$(E, dart.dynamic)]]}),
-      methods: () => ({
-        containsAll: [core.bool, [core.Iterable$(core.Object)]],
-        difference: [core.Set$(E), [core.Set$(E)]],
-        intersection: [core.Set$(E), [core.Set$(core.Object)]],
-        lookup: [E, [E]],
-        union: [core.Set$(E), [core.Set$(E)]]
-      })
-    });
-    dart.defineExtensionMembers(MapKeySet, [
-      'contains',
-      'toString',
-      'isEmpty',
-      'isNotEmpty',
-      'length'
-    ]);
-    return MapKeySet;
-  });
-  dart.defineLazyClassGeneric(exports, 'MapKeySet', {get: MapKeySet$});
-  const _keyForValue = Symbol('_keyForValue');
-  const MapValueSet$ = dart.generic(function(K, V) {
-    class MapValueSet extends _DelegatingIterableBase$(V) {
-      MapValueSet(base, keyForValue) {
-        this[_baseMap] = base;
-        this[_keyForValue] = keyForValue;
-        super._DelegatingIterableBase();
-      }
-      get [_base]() {
-        return this[_baseMap].values;
-      }
-      contains(element) {
-        if (element != null && !dart.is(element, V)) return false;
-        return this[_baseMap].containsKey(dart.dcall(this[_keyForValue], element));
-      }
-      get isEmpty() {
-        return this[_baseMap].isEmpty;
-      }
-      get isNotEmpty() {
-        return this[_baseMap].isNotEmpty;
-      }
-      get length() {
-        return this[_baseMap].length;
-      }
-      toString() {
-        return dart.toString(this.toSet());
-      }
-      add(value) {
-        dart.as(value, V);
-        let key = dart.as(dart.dcall(this[_keyForValue], value), K);
-        let result = false;
-        this[_baseMap].putIfAbsent(key, dart.fn(() => {
-          result = true;
-          return value;
-        }, V, []));
-        return result;
-      }
-      addAll(elements) {
-        dart.as(elements, core.Iterable$(V));
-        return elements[dartx.forEach](dart.bind(this, 'add'));
-      }
-      clear() {
-        return this[_baseMap].clear();
-      }
-      containsAll(other) {
-        return other[dartx.every](dart.bind(this, 'contains'));
-      }
-      difference(other) {
-        dart.as(other, core.Set$(V));
-        return this.where(dart.fn(element => !dart.notNull(other.contains(element)), core.bool, [V]))[dartx.toSet]();
-      }
-      intersection(other) {
-        return this.where(dart.bind(other, 'contains'))[dartx.toSet]();
-      }
-      lookup(element) {
-        return this[_baseMap].get(dart.dcall(this[_keyForValue], element));
-      }
-      remove(value) {
-        if (value != null && !dart.is(value, V)) return false;
-        let key = dart.dcall(this[_keyForValue], value);
-        if (!dart.notNull(this[_baseMap].containsKey(key))) return false;
-        this[_baseMap].remove(key);
-        return true;
-      }
-      removeAll(elements) {
-        return elements[dartx.forEach](dart.bind(this, 'remove'));
-      }
-      removeWhere(test) {
-        dart.as(test, dart.functionType(core.bool, [V]));
-        let toRemove = [];
-        this[_baseMap].forEach(dart.fn((key, value) => {
-          dart.as(key, K);
-          dart.as(value, V);
-          if (dart.notNull(test(value))) toRemove[dartx.add](key);
-        }, dart.void, [K, V]));
-        toRemove[dartx.forEach](dart.bind(this[_baseMap], 'remove'));
-      }
-      retainAll(elements) {
-        let valuesToRetain = core.Set$(V).identity();
-        for (let element of elements) {
-          if (element != null && !dart.is(element, V)) continue;
-          let key = dart.dcall(this[_keyForValue], element);
-          if (!dart.notNull(this[_baseMap].containsKey(key))) continue;
-          valuesToRetain.add(this[_baseMap].get(key));
-        }
-        let keysToRemove = [];
-        this[_baseMap].forEach(dart.fn((k, v) => {
-          dart.as(k, K);
-          dart.as(v, V);
-          if (!dart.notNull(valuesToRetain.contains(v))) keysToRemove[dartx.add](k);
-        }, dart.void, [K, V]));
-        keysToRemove[dartx.forEach](dart.bind(this[_baseMap], 'remove'));
-      }
-      retainWhere(test) {
-        dart.as(test, dart.functionType(core.bool, [V]));
-        return this.removeWhere(dart.fn(element => !dart.notNull(test(element)), core.bool, [V]));
-      }
-      union(other) {
-        dart.as(other, core.Set$(V));
-        return (() => {
-          let _ = this.toSet();
-          _.addAll(other);
-          return _;
-        })();
-      }
-    }
-    MapValueSet[dart.implements] = () => [core.Set$(V)];
-    dart.setSignature(MapValueSet, {
-      constructors: () => ({MapValueSet: [MapValueSet$(K, V), [core.Map$(K, V), dart.functionType(K, [V])]]}),
-      methods: () => ({
-        add: [core.bool, [V]],
-        addAll: [dart.void, [core.Iterable$(V)]],
-        clear: [dart.void, []],
-        containsAll: [core.bool, [core.Iterable$(core.Object)]],
-        difference: [core.Set$(V), [core.Set$(V)]],
-        intersection: [core.Set$(V), [core.Set$(core.Object)]],
-        lookup: [V, [core.Object]],
-        remove: [core.bool, [core.Object]],
-        removeAll: [dart.void, [core.Iterable$(core.Object)]],
-        removeWhere: [dart.void, [dart.functionType(core.bool, [V])]],
-        retainAll: [dart.void, [core.Iterable$(core.Object)]],
-        retainWhere: [dart.void, [dart.functionType(core.bool, [V])]],
-        union: [core.Set$(V), [core.Set$(V)]]
-      })
-    });
-    dart.defineExtensionMembers(MapValueSet, [
-      'contains',
-      'toString',
-      'isEmpty',
-      'isNotEmpty',
-      'length'
-    ]);
-    return MapValueSet;
-  });
-  let MapValueSet = MapValueSet$();
-  // Exports:
-  exports.DelegatingIterable$ = DelegatingIterable$;
-  exports.DelegatingIterable = DelegatingIterable;
-  exports.DelegatingList$ = DelegatingList$;
-  exports.DelegatingList = DelegatingList;
-  exports.DelegatingSet$ = DelegatingSet$;
-  exports.DelegatingSet = DelegatingSet;
-  exports.DelegatingQueue$ = DelegatingQueue$;
-  exports.DelegatingQueue = DelegatingQueue;
-  exports.DelegatingMap$ = DelegatingMap$;
-  exports.DelegatingMap = DelegatingMap;
-  exports.MapKeySet$ = MapKeySet$;
-  exports.MapValueSet$ = MapValueSet$;
-  exports.MapValueSet = MapValueSet;
-});