code: func (c *Callbacks) OnCSVCMsg_VoiceData(fn func(*dota.CSVCMsg_VoiceData) error) {
  	c.onCSVCMsg_VoiceData = append(c.onCSVCMsg_VoiceData, fn)
  }
docs: // OnCSVCMsg_VoiceData registers a callback for SVC_Messages_svc_VoiceData