@abc.abstractmethod<EOL><INDENT>def get_destination_types_by_source(self, source_type):<DEDENT>
return<EOL>
Gets all destination Types related to the given source ``Type``.

        :param source_type: a source type
        :type source_type: ``osid.type.Type``
        :return: the related types
        :rtype: ``osid.type.TypeList``
        :raise: ``NullArgument`` -- ``source_type`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

        *compliance: mandatory -- This method must be implemented.*