private void setMultipleElementCopyLabel(PsiElement[] elements) {
    boolean allFiles = true;
    boolean allDirectories = true;
    for (PsiElement element : elements) {
      if (element instanceof PsiDirectory) {
        allFiles = false;
      }
      else {
        allDirectories = false;
      }
    }
    if (allFiles) {
      myInformationLabel.setText(RefactoringBundle.message("copy.files.copy.specified.files.label"));
    }
    else if (allDirectories) {
      myInformationLabel.setText(RefactoringBundle.message("copy.files.copy.specified.directories.label"));
    }
    else {
      myInformationLabel.setText(RefactoringBundle.message("copy.files.copy.specified.mixed.label"));
    }
  }
private void setMultipleElementCopyLabel(PsiElement[] elements)