docs: def collation(self, collation):
          """Adds a :class:`~pymongo.collation.Collation` to this query.
  
          This option is only supported on MongoDB 3.4 and above.
  
          Raises :exc:`TypeError` if `collation` is not an instance of
          :class:`~pymongo.collation.Collation` or a ``dict``. Raises
          :exc:`~pymongo.errors.InvalidOperation` if this :class:`Cursor` has
          already been used. Only the last collation applied to this cursor has
          any effect.
  
          :Parameters:
            - `collation`: An instance of :class:`~pymongo.collation.Collation`.
          """
          self.__check_okay_to_chain()
          self.__collation = validate_collation_or_none(collation)
          return self