@Nullable
  private static GrReferenceExpression findRef(PsiElement element) {
    if ((element instanceof GrReferenceExpression)) {
      return (GrReferenceExpression)element;

    }
    else if (element instanceof GrArgumentList) {
      PsiElement parent = element.getParent();
      if (parent instanceof GrMethodCall) {
        GrExpression invoked = ((GrMethodCall)parent).getInvokedExpression();
        if (invoked instanceof GrReferenceExpression) {
          return ((GrReferenceExpression)invoked);
        }
      }
    }
    return null;
  }
@Nullable
  private static GrReferenceExpression findRef(PsiElement element)