code: func (h HandlerFunc) Handle(data json.RawMessage, ctx *apex.Context) (interface{}, error) {
  	var event Event
  
  	if err := json.Unmarshal(data, &event); err != nil {
  		return nil, err
  	}
  
  	return nil, h(&event, ctx)
  }
docs: // Handle implements apex.Handler.