code: func (u *UI) Child(indent int) *UI {
  	return &UI{
  		Indent: u.Indent + indent,
  		Cols:   u.Cols,
  
  		EnableProgress: u.EnableProgress,
  		EnableHints:    u.EnableHints,
  	}
  }
docs: // Child returns a new UI, with settings from the receiver UI, and Indent
  // increased by the provided value.