v2::V2NIMMessageCallAttachment 成员列表

成员的完整列表，这些成员属于 v2::V2NIMMessageCallAttachment,包括所有继承而来的类成员

attachmentType	v2::V2NIMMessageAttachment
channelId	v2::V2NIMMessageCallAttachment
durations	v2::V2NIMMessageCallAttachment
raw	v2::V2NIMMessageAttachment
status	v2::V2NIMMessageCallAttachment
type	v2::V2NIMMessageCallAttachment
V2NIMMessageCallAttachment()	v2::V2NIMMessageCallAttachment	inline
~V2NIMMessageAttachment()=default	v2::V2NIMMessageAttachment	virtual