__new__(cls,name=None,full_name=None,filename=None,containing_type=None,fields=None,nested_types=None,enum_types=None,extensions=None,options=None,serialized_options=None,is_extendable=True,extension_ranges=None,oneofs=None,file=None,serialized_start=None,serialized_end=None,syntax=None,create_key=None)