public boolean canChangeNickname() {
        return canChangeNickname;
    }
Returns true if room occupants are allowed to change their nicknames in the room. By
default, occupants are allowed to change their nicknames. A not_acceptable error will be
returned if an occupant tries to change his nickname and this feature is not enabled.

Notice that this feature is not supported by the MUC spec so answering a not_acceptable
error may break some clients.

@return true if room occupants are allowed to change their nicknames in the room.
xmppserver/src/main/java/org/jivesoftware/openfire/muc/MUCRoom.java