code: func ClippedParent(c Control) Control {
  	var clipped Control
  
  	ctrl := c.Parent()
  	clipped = c
  
  	for ctrl != nil {
  		if ctrl.Clipped() {
  			clipped = ctrl
  			break
  		}
  
  		ctrl = ctrl.Parent()
  	}
  
  	return clipped
  }
docs: // ClippedParent finds the first c parent with clipped flag