toString method
pretty print this thing .
Implementation
@override
String toString({bool extracts = false}) {
String result = " Konto Plan \n";
konten.forEach((key, kto) {
result += kto.toString(recursive: true, extracts: extracts) + "\n";
});
result += " Ende Konto Plan \n";
//print("extracted +$ktoName+ -$desc- ,=$w=, '$budget' #$valuta#\n");
//return "$number $name $desc $cur $valuta $budget";
return (result);
}