def get_format_types_for_source(self, source_format_type=None):
Gets the list of target format types for a given source spatial unit type.

        arg:    source_format_type (osid.type.Type): the type of the
                source format
        return: (osid.type.TypeList) - the list of supported target
                format types
        raise:  NullArgument - ``source_format_type`` is ``null``
        *compliance: mandatory -- This method must be implemented.*