code: func (c *Callbacks) OnCDOTAUserMsg_PredictionResult(fn func(*dota.CDOTAUserMsg_PredictionResult) error) {
  	c.onCDOTAUserMsg_PredictionResult = append(c.onCDOTAUserMsg_PredictionResult, fn)
  }
docs: // OnCDOTAUserMsg_PredictionResult registers a callback for EDotaUserMessages_DOTA_UM_PredictionResult