@Override
  public String expand(@NotNull final DataContext dataContext) {
    final Project project = CommonDataKeys.PROJECT.getData(dataContext);
    if (project == null) {
      return null;
    }
    VirtualFile file = CommonDataKeys.VIRTUAL_FILE.getData(dataContext);
    if (file == null) {
      return null;
    }
    final VirtualFile sourceRoot = ProjectRootManager.getInstance(project).getFileIndex().getSourceRootForFile(file);
    if (sourceRoot == null) {
      return null;
    }
    return FileUtil.getRelativePath(getIOFile(sourceRoot), getIOFile(file));
  }
@Override
  public String expand(@NotNull final DataContext dataContext)