Make isEmpty a getter.

runtime/lib/byte_array.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.
 
 patch class Int8List {
   /* patch */ factory Int8List(int length) {
     return new _Int8Array(length);
   }
 
   /* patch */ factory Int8List.view(ByteArray array,
@@ skipping 135 matching lines @@
   }
 
   bool every(bool f(element)) {
     return Collections.every(this, f);
   }
 
   bool some(bool f(element)) {
     return Collections.some(this, f);
   }
 
-  bool isEmpty() {
+  bool get isEmpty {
     return this.length === 0;
   }
 
   int get length {
     return _length();
   }
 
   // Methods implementing the List interface.
 
   set length(newLength) {
@@ skipping 1459 matching lines @@
   }
 
   bool every(bool f(element)) {
     return Collections.every(this, f);
   }
 
   bool some(bool f(element)) {
     return Collections.some(this, f);;
   }
 
-  bool isEmpty() {
+  bool get isEmpty {
     return this.length === 0;
   }
 
   abstract int get length;
 
   // Methods implementing the List interface.
 
   set length(newLength) {
     throw new UnsupportedError(
         "Cannot resize a non-extendable array");
@@ skipping 764 matching lines @@
     }
     _rangeCheck(this.length, start, length);
     return _array.subByteArray(_offset + start, length);
   }
 
   static const int _BYTES_PER_ELEMENT = 8;
   final ByteArray _array;
   final int _offset;
   final int _length;
 }