Roll Observatory packages and add a roll script

quiver/lib/src/collection/delegates/iterable.dart

-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-part of quiver.collection;
-
-/**
- * An implementation of [Iterable] that delegates all methods to another
- * [Iterable].
- * For instance you can create a FruitIterable like this :
- *
- *     class FruitIterable extends DelegatingIterable<Fruit> {
- *       final Iterable<Fruit> _fruits = [];
- *
- *       Iterable<Fruit> get delegate => _fruits;
- *
- *       // custom methods
- *     }
- */
-abstract class DelegatingIterable<E> implements Iterable<E> {
-  Iterable<E> get delegate;
-
-  bool any(bool test(E element)) => delegate.any(test);
-
-  bool contains(Object element) => delegate.contains(element);
-
-  E elementAt(int index) => delegate.elementAt(index);
-
-  bool every(bool test(E element)) => delegate.every(test);
-
-  Iterable expand(Iterable f(E element)) => delegate.expand(f);
-
-  E get first => delegate.first;
-
-  E firstWhere(bool test(E element), {E orElse()}) =>
-      delegate.firstWhere(test, orElse: orElse);
-
-  fold(initialValue, combine(previousValue, E element)) =>
-      delegate.fold(initialValue, combine);
-
-  void forEach(void f(E element)) => delegate.forEach(f);
-
-  bool get isEmpty => delegate.isEmpty;
-
-  bool get isNotEmpty => delegate.isNotEmpty;
-
-  Iterator<E> get iterator => delegate.iterator;
-
-  String join([String separator = ""]) => delegate.join(separator);
-
-  E get last => delegate.last;
-
-  E lastWhere(bool test(E element), {E orElse()}) =>
-      delegate.lastWhere(test, orElse: orElse);
-
-  int get length => delegate.length;
-
-  Iterable map(f(E element)) => delegate.map(f);
-
-  E reduce(E combine(E value, E element)) => delegate.reduce(combine);
-
-  E get single => delegate.single;
-
-  E singleWhere(bool test(E element)) => delegate.singleWhere(test);
-
-  Iterable<E> skip(int n) => delegate.skip(n);
-
-  Iterable<E> skipWhile(bool test(E value)) => delegate.skipWhile(test);
-
-  Iterable<E> take(int n) => delegate.take(n);
-
-  Iterable<E> takeWhile(bool test(E value)) => delegate.takeWhile(test);
-
-  List<E> toList({bool growable: true}) => delegate.toList(growable: growable);
-
-  Set<E> toSet() => delegate.toSet();
-
-  Iterable<E> where(bool test(E element)) => delegate.where(test);
-}