code: func (c *Callbacks) OnCDOTAUserMsg_ProjectionAbility(fn func(*dota.CDOTAUserMsg_ProjectionAbility) error) {
  	c.onCDOTAUserMsg_ProjectionAbility = append(c.onCDOTAUserMsg_ProjectionAbility, fn)
  }
docs: // OnCDOTAUserMsg_ProjectionAbility registers a callback for EDotaUserMessages_DOTA_UM_ProjectionAbility