a ”ˆ«hã@s4ddlZddlZdgZej ¡ZGdd„deƒZdS)éNÚ ClassLoadercsDeZdZgd¢Zdd„Z‡fdd„Zdd„Zdd „Zd d „Z‡Z S) r)Ú _namespaceÚ_prefixÚ _interfacecCs tƒ‚dS)z~ This method has to be implemented in child class and should set _namespace, _prefix, and _interface member attributes. N)ÚNotImplementedError©Úself©r ús