code: func (c *Callbacks) OnCDOTAUserMsg_AbilityPing(fn func(*dota.CDOTAUserMsg_AbilityPing) error) {
  	c.onCDOTAUserMsg_AbilityPing = append(c.onCDOTAUserMsg_AbilityPing, fn)
  }
docs: // OnCDOTAUserMsg_AbilityPing registers a callback for EDotaUserMessages_DOTA_UM_AbilityPing