label.go
func (l *Label) SetText(format string, args ...interface{}) {
	l.text = fmt.Sprintf(format, args...)
}
func (l *Label) SetText(format string, args ...interface{}) {
	l.text = fmt.Sprintf(format, args...)
}
func ( l * Label ) SetText ( format string , args ... interface { } ) { l . text = fmt . Sprintf ( format , args ... ) }
// SetText sets the label caption.  This will not be displayed immediately.
// SetText shall be called from queue context.
SetText sets the label caption . This will not be displayed immediately . SetText shall be called from queue context .