code: func (a *Application) ResizeToFullScreen(p Primitive) *Application {
  	a.RLock()
  	width, height := a.screen.Size()
  	a.RUnlock()
  	p.SetRect(0, 0, width, height)
  	return a
  }
docs: // ResizeToFullScreen resizes the given primitive such that it fills the entire
  // screen.