code: func NewSimpleStyledText() *SimpleStyledText {
  	ss := &SimpleStyledText{}
  	// Create map and establish default styles.
  	ss.styles = make(map[rune]tcell.Style)
  	ss.styles['N'] = tcell.StyleDefault
  	ss.styles['S'] = tcell.StyleDefault.Reverse(true)
  	ss.styles['U'] = tcell.StyleDefault.Underline(true)
  	ss.styles['B'] = tcell.StyleDefault.Bold(true)
  	return ss
  }
docs: // NewSimpleStyledText creates an empty Text.