show method
Implementation
String show(){
final d = (this.valueAvailable & !this.valueOnly) ? "${MarkChars.lf}delime: ${this.delime}" : "";
final n = AngleQuote().cover(this.name);
final rq = this.valueRequired ? "Required" : "Optional";
final vo = this.valueOnly ? "; Only" : "";
final va = this.valueAvailable ? "Available; $rq$vo" : "";
return """$n
starts: $starts
value: $va$d""";
}