code: def from_api_repr(cls, api_repr):
          
          api_repr = api_repr.strip()
          if not api_repr:
              raise ValueError("Field path API representation cannot be empty.")
          return cls(*parse_field_path(api_repr))
docs: Factory: create a FieldPath from the string formatted per the API.
  
          Args:
              api_repr (str): a string path, with non-identifier elements quoted
              It cannot exceed 1500 characters, and cannot be empty.
          Returns:
              (:class:`FieldPath`) An instance parsed from ``api_repr``.
          Raises:
              ValueError if the parsing fails