1.[from():Contact](https://github.com/chatie/wechaty/wiki/API#1-messagefrom-contact) get the sender of a message
2.[from(contact:Contact):void](https://github.com/chatie/wechaty/wiki/API#2-messagefromcontact-contact-void) set a sender of the message
4.[to():Contact](https://github.com/chatie/wechaty/wiki/API#1-messageto-contact) get the destination for the message
5.[to(contact:Contact):void](https://github.com/chatie/wechaty/wiki/API#2-messagetocontact-contact-void) set the destination as contact for the message
7.[content():string](https://github.com/chatie/wechaty/wiki/API#1-messagecontent-string) get the content of the message
8.[content(content:string):string](https://github.com/chatie/wechaty/wiki/API#2-messagecontentcontent-string-string) set the content for the message
9.[room():Room|null](https://github.com/chatie/wechaty/wiki/API#1-messageroom-room--null) get the room from a message.
10.[room(room:Room):void](https://github.com/chatie/wechaty/wiki/API#2-messageroomroom-room-void) set the room for a message.
12.[type():MsgType](https://github.com/chatie/wechaty/wiki/API#messagetype-number) get the type of a Message.
13.[say(content:string):Promise](https://github.com/chatie/wechaty/wiki/API#messagesaycontent-string-promise) send a reply message to the sender.
15.[self():boolean](https://github.com/chatie/wechaty/wiki/API#messageselfmessage-message-boolean) check if a message is sent by self