Make hasNext a getter instead of a method.

lib/utf/utf16.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.
 
 
 /**
  * Decodes the UTF-16 bytes as an iterable. Thus, the consumer can only convert
  * as much of the input as needed. Determines the byte order from the BOM,
  * or uses big-endian as a default. This method always strips a leading BOM.
  * Set the [replacementCodepoint] to null to throw an ArgumentError
@@ skipping 246 matching lines @@
   }
 
   /**
    * Provides a fast way to decode the rest of the source bytes in a single
    * call. This method trades memory for improved speed in that it potentially
    * over-allocates the List containing results.
    */
   List<int> decodeRest() {
     List<int> codeunits = new List<int>(remaining);
     int i = 0;
-    while (hasNext()) {
+    while (hasNext) {
       codeunits[i++] = next();
     }
     if (i == codeunits.length) {
       return codeunits;
     } else {
       List<int> truncCodeunits = new List<int>(i);
       truncCodeunits.setRange(0, i, codeunits);
       return truncCodeunits;
     }
   }
 
-  bool hasNext() => utf16EncodedBytesIterator.hasNext();
+  bool get hasNext => utf16EncodedBytesIterator.hasNext;
 
   int next() {
     if (utf16EncodedBytesIterator.remaining < 2) {
       utf16EncodedBytesIterator.next();
       if (replacementCodepoint != null) {
         return replacementCodepoint;
       } else {
         throw new ArgumentError(
             "Invalid UTF16 at ${utf16EncodedBytesIterator.position}");
       }
@@ skipping 53 matching lines @@
       skip();
     }
   }
 
   int decode() {
     int lo = utf16EncodedBytesIterator.next();
     int hi = utf16EncodedBytesIterator.next();
     return (hi << 8) + lo;
   }
 }