code: func (c *Callbacks) OnCDOTAUserMsg_ShowSurvey(fn func(*dota.CDOTAUserMsg_ShowSurvey) error) {
  	c.onCDOTAUserMsg_ShowSurvey = append(c.onCDOTAUserMsg_ShowSurvey, fn)
  }
docs: // OnCDOTAUserMsg_ShowSurvey registers a callback for EDotaUserMessages_DOTA_UM_ShowSurvey