@Override
      public void invoke(@NotNull Project project, Editor editor, PsiFile file, DataContext dataContext) {
        editor.getScrollingModel().scrollToCaret(ScrollType.MAKE_VISIBLE);
        final PsiElement targetMember = findTargetMember(element);
        if (targetMember == null) {
          final ChangeSignatureHandler handler = getChangeSignatureHandler(file);
          if (handler != null) {
            final String notFoundMessage = handler.getTargetNotFoundMessage();
            if (notFoundMessage != null) {
              CommonRefactoringUtil.showErrorHint(project, editor, notFoundMessage, RefactoringBundle
                .message("changeSignature.refactoring.name"), null);
            }
          }
          return;
        }
        final ChangeSignatureHandler handler = getChangeSignatureHandler(targetMember);
        if (handler == null) return;
        handler.invoke(project, new PsiElement[]{targetMember}, dataContext);
      }
@Override
      public void invoke(@NotNull Project project, Editor editor, PsiFile file, DataContext dataContext)