Returns the contact identifier representing this contact. In protocols
like IRC this method would return the same as getName() but in others
like Jabber, this method would return a full contact id uri.
Returns the name of this member as it is known in its containing
chatroom (aka a nickname). The name returned by this method, may
sometimes match the string returned by getContactID() which is actually
the address of a contact in the realm of the corresponding protocol.
Returns the protocol contact corresponding to this member in our contact
list. The contact returned here could be used by the user interface to
check if this member is contained in our contact list and in function of
this to show additional information add additional functionality.
Returns the status of the chat room member as per the last status update
we've received for it. Note that this method is not to perform any
network operations and will simply return the status received in the last
status update message.