code: func (c *Callbacks) OnCEntityMessageRemoveAllDecals(fn func(*dota.CEntityMessageRemoveAllDecals) error) {
  	c.onCEntityMessageRemoveAllDecals = append(c.onCEntityMessageRemoveAllDecals, fn)
  }
docs: // OnCEntityMessageRemoveAllDecals registers a callback for EBaseEntityMessages_EM_RemoveAllDecals