@Nullable
  private static String getReferenceName(LighterAST tree, LighterASTNode refParent) {
    return JavaLightTreeUtil.getNameIdentifierText(tree, LightTreeUtil.firstChildOfType(tree, refParent, JAVA_CODE_REFERENCE));
  }
@Nullable
  private static String getReferenceName(LighterAST tree, LighterASTNode refParent)