**DEPRECATED**: All incoming SON manipulators.

        .. versionchanged:: 3.5
          Deprecated.

        .. versionadded:: 2.0

def incoming_manipulators(self):
        """**DEPRECATED**: All incoming SON manipulators.

        .. versionchanged:: 3.5
          Deprecated.

        .. versionadded:: 2.0
        """
        warnings.warn("Database.incoming_manipulators() is deprecated",
                      DeprecationWarning, stacklevel=2)

        return [manipulator.__class__.__name__
                for manipulator in self.__incoming_manipulators]