get Typing Content Type
Retrieves the type name of the message currently being typed. The `typingContentType` represents the type name of the message the user is currently editing, which is the return value of `getObjectName` in the message object. For example, for a text message, pass the type name RC:TxtMsg.
Return
The type name of the message currently being typed. The `typingContentType` represents the type name of the message the user is currently editing, which is the return value of `getObjectName` in the message object. For example, for a text message, pass the type name RC:TxtMsg.