@Override
 public Collection<AnnotationSummary> searchByPreferredSources(
     String propertyType,
     String propertyValuePattern,
     List<URI> preferredSources,
     URI... requiredSources) {
   return _annotatationSummarySearchService.searchByPreferredSources(
       propertyType, propertyValuePattern, preferredSources, requiredSources);
 }
 @Override
 public Collection<AnnotationSummary> searchBySemanticTags(URI... semanticTags) {
   return _annotatationSummarySearchService.searchBySemanticTags(semanticTags);
 }
 @Override
 public Collection<AnnotationSummary> searchByPrefix(
     String propertyType, String propertyValuePrefix, URI... sources) {
   return _annotatationSummarySearchService.searchByPrefix(
       propertyType, propertyValuePrefix, sources);
 }
 @Override
 public Collection<AnnotationSummary> searchBySemanticTags(String... semanticTagShortnames) {
   return _annotatationSummarySearchService.searchBySemanticTags(semanticTagShortnames);
 }
 @Override
 public Collection<AnnotationSummary> search(String propertyValuePattern, URI... sources) {
   return _annotatationSummarySearchService.search(propertyValuePattern, sources);
 }