code: func (c *Callbacks) OnCSVCMsg_GetCvarValue(fn func(*dota.CSVCMsg_GetCvarValue) error) {
  	c.onCSVCMsg_GetCvarValue = append(c.onCSVCMsg_GetCvarValue, fn)
  }
docs: // OnCSVCMsg_GetCvarValue registers a callback for SVC_Messages_svc_GetCvarValue