code: def _sanitize_mod_params(self, other):
          
          if other is None:
              params = (other,)
          elif isinstance(other, dict):
              params = self._trim_dictionary_parameters(other)
          else:
              params = self._copy_param(other)
          return params
docs: Sanitize the object being modded with this Message.
  
          - Add support for modding 'None' so translation supports it
          - Trim the modded object, which can be a large dictionary, to only
          those keys that would actually be used in a translation
          - Snapshot the object being modded, in case the message is
          translated, it will be used as it was when the Message was created