Make isEmpty a getter.

runtime/bin/buffer_list.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.
 
 /**
  * Utility class that holds a number of byte buffers and can deliver
  * the bytes either one by one or in chunks.
  */
 class _BufferList {
   _BufferList() {
     clear();
   }
 
   /**
    * Adds a new buffer to the list possibly with an offset of the
    * first byte of interest. The offset can only be specified if the
    * buffer list is empty.
    */
   void add(List<int> buffer, [int offset = 0]) {
-    assert(offset == 0 || _buffers.isEmpty());
+    assert(offset == 0 || _buffers.isEmpty);
     _buffers.addLast(buffer);
     _length += buffer.length;
     if (offset != 0) _index = offset;
   }
 
   /**
    * Returns the first buffer from the list. This returns the whole
    * buffer and does not remove the buffer from the list. Use
    * [index] to determine the index of the first byte in the buffer.
    */
@@ skipping 97 matching lines @@
 
   /**
    * Returns the total number of bytes remaining in the buffers.
    */
   int get length => _length;
 
   /**
    * Returns whether the buffer list is empty that is has no bytes
    * available.
    */
-  bool isEmpty() => _buffers.isEmpty();
+  bool get isEmpty => _buffers.isEmpty;
 
   /**
    * Clears the content of the buffer list.
    */
   void clear() {
     _index = 0;
     _length = 0;
     _buffers = new Queue();
   }
 
   int _length;  // Total number of bytes remaining in the buffers.
   Queue<List<int>> _buffers;  // List of data buffers.
   int _index;  // Index of the next byte in the first buffer.
 }