protected PsiElement @NotNull [] findOccurrences(@NotNull GrExpression expression, @NotNull PsiElement scope) {
    final PsiElement[] occurrences = GroovyRefactoringUtil.getExpressionOccurrences(PsiUtil.skipParentheses(expression, false), scope);
    if (occurrences == null || occurrences.length == 0) {
      throw new GrRefactoringError(GroovyRefactoringBundle.message("no.occurrences.found"));
    }
    return occurrences;
  }
protected PsiElement @NotNull [] findOccurrences(@NotNull GrExpression expression, @NotNull PsiElement scope)