Make 'where' lazy.

samples/third_party/dromaeo/Suites.dart

 library Suites;
 
 class Origin {
   final String author;
   final String url;
 
   const Origin(this.author, this.url);
 }
 
 class SuiteDescription {
@@ skipping 129 matching lines @@
 
     bool match(suite) {
       // If any conjunction matches, return true.
       for (final tagset in taglist) {
         if (tagset.every((tag) => suite.tags.indexOf(tag) >= 0)) {
           return true;
         }
       }
       return false;
     }
-    final suites = SUITE_DESCRIPTIONS.where(match);
+    final suites = SUITE_DESCRIPTIONS.where(match).toList();
 
     suites.sort((s1, s2) => s1.name.compareTo(s2.name));
     return suites;
   }
 
   static getCategory(String tags) {
     if (CATEGORIES.containsKey(tags)) {
       return CATEGORIES[tags];
     }
     for (final suite in _CORE_SUITE_DESCRIPTIONS) {
       if (suite.tags[0] == tags) {
         return suite.name;
       }
     }
     return null;
   }
 }