toString method
A string representation of this object.
Some classes have a default textual representation,
often paired with a static parse function (like int.parse).
These classes will provide the textual representation as
their string representation.
Other classes have no meaningful textual representation
that a program will care about.
Such classes will typically override toString to provide
useful information when inspecting the object,
mainly for debugging or logging.
Implementation
@override
String toString() {
  final $buf = StringBuffer()..writeln('PriceUpdateOptions(');
  if (active != null) {
    $buf
      ..writeln()
      ..write('  active: ')
      ..write(active)
      ..write(',');
  }
  if (currencyOptions != null) {
    $buf
      ..writeln()
      ..write('  currency_options: ')
      ..write(currencyOptions)
      ..write(',');
  }
  if (expand != null) {
    $buf
      ..writeln()
      ..write('  expand: ')
      ..write(expand)
      ..write(',');
  }
  if (lookupKey != null) {
    $buf
      ..writeln()
      ..write('  lookup_key: ')
      ..write(lookupKey)
      ..write(',');
  }
  if (metadata != null) {
    $buf
      ..writeln()
      ..write('  metadata: ')
      ..write(metadata)
      ..write(',');
  }
  if (nickname != null) {
    $buf
      ..writeln()
      ..write('  nickname: ')
      ..write(nickname)
      ..write(',');
  }
  if (taxBehavior != null) {
    $buf
      ..writeln()
      ..write('  tax_behavior: ')
      ..write(taxBehavior)
      ..write(',');
  }
  if (transferLookupKey != null) {
    $buf
      ..writeln()
      ..write('  transfer_lookup_key: ')
      ..write(transferLookupKey)
      ..write(',');
  }
  $buf.write(')');
  return $buf.toString();
}