emit interfaces before use

lib/runtime/dart/_js_helper.js

 var _js_helper;
 (function(exports) {
   'use strict';
   class NoSideEffects extends core.Object {
     NoSideEffects() {
     }
   }
   class NoThrows extends core.Object {
     NoThrows() {
     }
@@ skipping 1321 matching lines @@
   }
   // Function isNotIdentical: (dynamic, dynamic) → bool
   function isNotIdentical(s, t) {
     return s !== t;
   }
   class _Patch extends core.Object {
     _Patch() {
     }
   }
   let patch = new _Patch();
-  class InternalMap extends core.Object {
-  }
+  class InternalMap extends core.Object {}
   // Function requiresPreamble: () → dynamic
   function requiresPreamble() {
   }
   // Function isJsIndexable: (dynamic, dynamic) → bool
   function isJsIndexable(object, record) {
     if (record != null) {
       let result = _interceptors.dispatchRecordIndexability(record);
       if (result != null)
         return dart.as(result, core.bool);
     }
@@ skipping 1461 matching lines @@
   Closure.NAME_INDEX = 1;
   Closure.CALL_NAME_INDEX = 2;
   Closure.REQUIRED_PARAMETER_INDEX = 3;
   Closure.OPTIONAL_PARAMETER_INDEX = 4;
   Closure.DEFAULT_ARGUMENTS_INDEX = 5;
   Closure.functionCounter = 0;
   // Function closureFromTearOff: (dynamic, dynamic, dynamic, dynamic, dynamic, dynamic) → dynamic
   function closureFromTearOff(receiver, functions, reflectionInfo, isStatic, jsArguments, name) {
     return Closure.fromTearOff(receiver, _interceptors.JSArray.markFixedList(dart.as(functions, core.List)), _interceptors.JSArray.markFixedList(dart.as(reflectionInfo, core.List)), !!isStatic, jsArguments, name);
   }
-  class TearOffClosure extends Closure {
-  }
+  class TearOffClosure extends Closure {}
   let _self = Symbol('_self');
   let _target = Symbol('_target');
   let _name = Symbol('_name');
   class BoundClosure extends TearOffClosure {
     BoundClosure(self$, target$, receiver$, name$) {
       this[_self] = self$;
       this[_target] = target$;
       this[_receiver] = receiver$;
       this[_name] = name$;
       super.TearOffClosure();
@@ skipping 338 matching lines @@
     throw new TypeErrorImplementation.fromMessage(dart.as(message, core.String));
   }
   // Function checkDeferredIsLoaded: (String, String) → void
   function checkDeferredIsLoaded(loadId, uri) {
     if (!dart.notNull(exports._loadedLibraries.contains(loadId))) {
       throw new DeferredNotLoadedError(uri);
     }
   }
   dart.defineLazyClass(exports, {
     get JavaScriptIndexingBehavior() {
-      class JavaScriptIndexingBehavior extends _interceptors.JSMutableIndexable {
-      }
+      class JavaScriptIndexingBehavior extends _interceptors.JSMutableIndexable {}
       return JavaScriptIndexingBehavior;
     }
   });
   class TypeErrorImplementation extends core.Error {
     TypeErrorImplementation(value, type) {
       this.message = `type '${Primitives.objectTypeName(value)}' is not a subtype ` + `of type '${type}'`;
       super.Error();
     }
     fromMessage(message) {
       this.message = message;
@@ skipping 805 matching lines @@
   exports.UnimplementedNoSuchMethodError = UnimplementedNoSuchMethodError;
   exports.random64 = random64;
   exports.jsonEncodeNative = jsonEncodeNative;
   exports.getIsolateAffinityTag = getIsolateAffinityTag;
   exports.loadDeferredLibrary = loadDeferredLibrary;
   exports.MainError = MainError;
   exports.missingMain = missingMain;
   exports.badMain = badMain;
   exports.mainHasTooManyParameters = mainHasTooManyParameters;
 })(_js_helper || (_js_helper = {}));