ReplaceMessenger
status_t ReplaceMessenger(const char *name, BMessenger messenger);
status_t ReplaceMessenger(const char *name, int32 index, BMessenger messenger);
status_t ReplaceMessenger(const char* name,
status_t ReplaceMessenger(const char* name, int32 index,
{ return msg.ReplaceMessenger(name, index, val); }