Make isEmpty a getter.

utils/apidoc/apidoc.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.
 
 /**
  * This generates the reference documentation for the core libraries that come
  * with dart. It is built on top of dartdoc, which is a general-purpose library
  * for generating docs from any Dart code. This library extends that to include
  * additional information and styling specific to our standard library.
  *
@@ skipping 357 matching lines @@
     if (library.simpleName == 'dart:nativewrappers') return;
     super.docLibrary(library);
   }
 
   /** Override definition from parent class to strip out annotation tags. */
   doc.DocComment createDocComment(String text,
                                   [InterfaceMirror inheritedFrom]) {
     String strippedText =
         text.replaceAll(const RegExp("@([a-zA-Z]+) ([^;]+)(?:;|\$)"),
                         '').trim();
-    if (strippedText.isEmpty()) return null;
+    if (strippedText.isEmpty) return null;
     return super.createDocComment(strippedText, inheritedFrom);
   }
 
   doc.DocComment getLibraryComment(LibraryMirror library) {
     if (library.simpleName == HTML_LIBRARY_NAME) {
       return htmldoc.libraryComment;
     }
     return super.getLibraryComment(library);
   }
 
@@ skipping 85 matching lines @@
       typeString = domTypes.iterator().next();
     } else {
       // Not a DOM type.
       return null;
     }
 
     final mdnType = mdn[typeString];
     if (mdnType == null) return null;
     if (mdnType['skipped'] != null) return null;
     if (mdnType['summary'] == null) return null;
-    if (mdnType['summary'].trim().isEmpty()) return null;
+    if (mdnType['summary'].trim().isEmpty) return null;
 
     // Remember which MDN page we're using so we can attribute it.
     return new MdnComment(mdnType['summary'], mdnType['srcUrl']);
   }
 
   /**
    * Gets the MDN-scraped docs for [member], or `null` if this type isn't
    * scraped from MDN.
    */
   MdnComment includeMdnMemberComment(MemberMirror member) {
@@ skipping 29 matching lines @@
       for (final candidateMember in mdnType['members']) {
         if (candidateMember['name'] == nameToFind) {
           mdnMember = candidateMember;
           break;
         }
       }
     }
 
     if (mdnMember == null) return null;
     if (mdnMember['help'] == null) return null;
-    if (mdnMember['help'].trim().isEmpty()) return null;
+    if (mdnMember['help'].trim().isEmpty) return null;
 
     // Remember which MDN page we're using so we can attribute it.
     return new MdnComment(mdnMember['help'], mdnType['srcUrl']);
   }
 
   /**
    * Returns a link to [member], relative to a type page that may be in a
    * different library than [member].
    */
   String _linkMember(MemberMirror member) {
@@ skipping 24 matching lines @@
    return '''
         <div class="mdn">
         $mdnComment
         <div class="mdn-note"><a href="$mdnUrl">from MDN</a></div>
         </div>
         ''';
   }
 
   String toString() => mdnComment;
 }