@Override
  public void invoke(@NotNull Project project,
                     @NotNull PsiFile file,
                     @Nullable Editor editor,
                     @NotNull PsiElement startElement,
                     @NotNull PsiElement endElement) {
    final PsiParameter myParameter = (PsiParameter)startElement;
    if (!FileModificationService.getInstance().prepareFileForWrite(myParameter.getContainingFile())) return;
    removeReferences(myParameter);
  }
@Override
  public void invoke(@NotNull Project project,
                     @NotNull PsiFile file,
                     @Nullable Editor editor,
                     @NotNull PsiElement startElement,
                     @NotNull PsiElement endElement)