copyWith method
Implementation
CreditDocumentMetadata copyWith(
    {String? name,
    String? documentType,
    String? downloadUrl,
    String? status}) {
  return CreditDocumentMetadata(
      name: name ?? this.name,
      documentType: documentType ?? this.documentType,
      downloadUrl: downloadUrl ?? this.downloadUrl,
      status: status ?? this.status);
}