@abc.abstractmethod<EOL><INDENT>def get_language_types_for_source(self, source_language_type, source_script_type):<DEDENT>
return<EOL>
Gets the list of target language types for a given source language type.

        :param source_language_type: the type of the source language
        :type source_language_type: ``osid.type.Type``
        :param source_script_type: the type of the source script
        :type source_script_type: ``osid.type.Type``
        :return: the list of supported types for the given source language type
        :rtype: ``osid.type.TypeList``
        :raise: ``NullArgument`` -- ``source_language_type`` is ``null``

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