render method

Implementation

@override
String render() {
  final buffer = StringBuffer();

  for (var i = 0; i < children.length; i++) {
    if (i > 0) {
      buffer.writeln();
      for (var s = 0; s < spacing; s++) {
        buffer.writeln();
      }
    }
    buffer.write(children[i].render());
  }

  return buffer.toString();
}