docs: def _get_library_root_key_for_os_path(self, path):
          """Return library root key if path is within library root paths"""
          path = os.path.realpath(path)
          library_root_key = None
          for library_root_key, library_root_path in self._library_root_paths.items():
              rel_path = os.path.relpath(path, library_root_path)
              if rel_path.startswith('..'):
                  library_root_key = None
                  continue
              else:
                  break
          return library_root_key