def METHOD_NAME(cls):
    if cls._schema_on_200 is not None:
        return cls._schema_on_200
    cls._schema_on_200 = AAZObjectType()
    _schema_on_200 = cls._schema_on_200
    _schema_on_200.key1 = AAZStrType(
        flags={"read_only": True},
    )
    _schema_on_200.key2 = AAZStrType(
        flags={"read_only": True},
    )
    return cls._schema_on_200