public static List<IndexExtension<?, ?, CompiledFileData>> getIndices() {
    return Arrays.asList(createBackwardClassDefinitionExtension(),
                         createBackwardUsagesExtension(),
                         createBackwardHierarchyExtension(),
                         createBackwardSignatureExtension(),
                         createBackwardCastExtension(),
                         createImplicitToStringExtension());
  }
public static List<IndexExtension<?, ?, CompiledFileData>> getIndices()