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('PaymentMethodDetailsPaypal(');
  if (payerEmail != null) {
    $buf
      ..writeln()
      ..write('  payer_email: ')
      ..write(payerEmail)
      ..write(',');
  }
  if (payerId != null) {
    $buf
      ..writeln()
      ..write('  payer_id: ')
      ..write(payerId)
      ..write(',');
  }
  if (payerName != null) {
    $buf
      ..writeln()
      ..write('  payer_name: ')
      ..write(payerName)
      ..write(',');
  }
  if (sellerProtection != null) {
    $buf
      ..writeln()
      ..write('  seller_protection: ')
      ..write(sellerProtection)
      ..write(',');
  }
  if (transactionId != null) {
    $buf
      ..writeln()
      ..write('  transaction_id: ')
      ..write(transactionId)
      ..write(',');
  }
  $buf.write(')');
  return $buf.toString();
}