@Nullable
  private static String getInvokedMethodName(GrCall call) {
    if (call instanceof GrMethodCall) {
      final GrExpression expr = ((GrMethodCall)call).getInvokedExpression();
      if (expr instanceof GrReferenceExpression) {
        return ((GrReferenceExpression)expr).getReferenceName();
      }
    }
    return null;
  }
@Nullable
  private static String getInvokedMethodName(GrCall call)