code: func (t *TextBar) SetLeft(s string, style tcell.Style) {
  	t.initialize()
  	if style == tcell.StyleDefault {
  		style = t.style
  	}
  	t.left.SetText(s)
  	t.left.SetStyle(style)
  }
docs: // SetLeft sets the left text for the textbar.  It is always left-aligned.