Make first and last getters.

lib/core/sequences.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * An indexed sequence of elements of the same type.
  *
  * This is a primitive interface that any finite integer-indexable
  * sequence can implement.
  * It is intended for data structures where access by index is
@@ skipping 99 matching lines @@
   }
 
   int lastIndexOf(E value, [int start]) {
     if (start == null) start = sequence.length - 1;
     for (int i = start; i >= 0; i--) {
       if (sequence[i] == value) return i;
     }
     return -1;
   }
 
-  E last() => sequence[sequence.length - 1];
+  E get last => sequence[sequence.length - 1];
 
   List<E> getRange(int start, int length) {
     List<E> result = <E>[];
     for (int i = 0; i < length; i++) {
       result.add(sequence[start + i]);
     }
     return result;
   }
 
   void operator []=(int index, E value) {
@@ skipping 64 matching lines @@
   Sequence<E> _sequence;
   int _position;
   SequenceIterator(this._sequence) : _position = 0;
   bool get hasNext => _position < _sequence.length;
   E next() {
     if (hasNext) return _sequence[_position++];
     throw new NoMoreElementsException();
   }
 }