code: func (c *Callbacks) OnCDOTAUserMsg_FlipCoinResult(fn func(*dota.CDOTAUserMsg_FlipCoinResult) error) {
  	c.onCDOTAUserMsg_FlipCoinResult = append(c.onCDOTAUserMsg_FlipCoinResult, fn)
  }
docs: // OnCDOTAUserMsg_FlipCoinResult registers a callback for EDotaUserMessages_DOTA_UM_FlipCoinResult