code: func (c *Callbacks) OnCMsgClearWorldDecalsEvent(fn func(*dota.CMsgClearWorldDecalsEvent) error) {
  	c.onCMsgClearWorldDecalsEvent = append(c.onCMsgClearWorldDecalsEvent, fn)
  }
docs: // OnCMsgClearWorldDecalsEvent registers a callback for EBaseGameEvents_GE_ClearWorldDecalsEvent