render method
Renders the component as a string.
Implementation
@override
String render() {
final leftLen = Style.visibleLength(left);
final rightLen = Style.visibleLength(right);
final available =
renderConfig.terminalWidth - indent - leftLen - rightLen - 2;
final fill = available > 0 ? ' ${fillChar * available} ' : ' ';
return '${' ' * indent}$left$fill$right';
}