code: func (c *Callbacks) OnCSVCMsg_SplitScreen(fn func(*dota.CSVCMsg_SplitScreen) error) {
  	c.onCSVCMsg_SplitScreen = append(c.onCSVCMsg_SplitScreen, fn)
  }
docs: // OnCSVCMsg_SplitScreen registers a callback for SVC_Messages_svc_SplitScreen