@Deprecated
  private static <T extends PsiFileSystemItem> FileReferenceHelper getHelper(final @NotNull T psiFileSystemItem) {
    final VirtualFile file = psiFileSystemItem.getVirtualFile();
    if (file == null) return null;
    final Project project = psiFileSystemItem.getProject();
    return ContainerUtil.find(getHelpers(), fileReferenceHelper -> fileReferenceHelper.isMine(project, file));
  }
@Deprecated
  private static <T extends PsiFileSystemItem> FileReferenceHelper getHelper(final @NotNull T psiFileSystemItem)