code: func (c *Callbacks) OnCNETMsg_SpawnGroup_SetCreationTick(fn func(*dota.CNETMsg_SpawnGroup_SetCreationTick) error) {
  	c.onCNETMsg_SpawnGroup_SetCreationTick = append(c.onCNETMsg_SpawnGroup_SetCreationTick, fn)
  }
docs: // OnCNETMsg_SpawnGroup_SetCreationTick registers a callback for NET_Messages_net_SpawnGroup_SetCreationTick