成员的完整列表，这些成员属于 http::old_v1::ws::FrameBasicMasked,包括所有继承而来的类成员

data()	http::old_v1::ws::FrameBasicMasked	inline
fin	http::old_v1::ws::FrameBase
FrameBase()	http::old_v1::ws::FrameBase	inline
FrameBasicMasked()	http::old_v1::ws::FrameBasicMasked	inline
mask	http::old_v1::ws::FrameBase
maskingKey	http::old_v1::ws::FrameBasicMasked
opcode	http::old_v1::ws::FrameBase
payloadLen	http::old_v1::ws::FrameBase
rsv1	http::old_v1::ws::FrameBase
rsv2	http::old_v1::ws::FrameBase
rsv3	http::old_v1::ws::FrameBase