code: func (c *Callbacks) OnCDOTAUserMsg_ClientLoadGridNav(fn func(*dota.CDOTAUserMsg_ClientLoadGridNav) error) {
  	c.onCDOTAUserMsg_ClientLoadGridNav = append(c.onCDOTAUserMsg_ClientLoadGridNav, fn)
  }
docs: // OnCDOTAUserMsg_ClientLoadGridNav registers a callback for EDotaUserMessages_DOTA_UM_ClientLoadGridNav