def get_language_types_for_source(self, source_language_type=None, source_script_type=None):
Gets the list of target language types for a given source language type.

        arg:    source_language_type (osid.type.Type): the type of the
                source language
        arg:    source_script_type (osid.type.Type): the type of the
                source script
        return: (osid.type.TypeList) - the list of supported types for
                the given source language type
        raise:  NullArgument - ``source_language_type`` is ``null``
        *compliance: mandatory -- This method must be implemented.*