public static Debt GetDebt(this ISharedPreferences sharedPref, string key)
{
var id = sharedPref.GetIntOrThrow(key + IdSuffix);
var contact = sharedPref.GetContact(key + ContactSuffix);
var money = sharedPref.GetMoney(key + MoneySuffix);
var creationDate = sharedPref.GetDate(key + CreationDateSuffix);
sharedPref.CheckContains(key + CommentSuffix);
var comment = sharedPref.GetString(key + CommentSuffix, "");
sharedPref.CheckContains(key + IsPaidSuffix);
var isPaid = sharedPref.GetBoolean(key + IsPaidSuffix, false);
sharedPref.CheckContains(key + HasPaymentDateSuffix);
var hasPaymentDate = sharedPref.GetBoolean(key + HasPaymentDateSuffix, false);
var debt = hasPaymentDate
? new Debt(id, contact, money, comment, creationDate, sharedPref.GetDate(key + PaymentDateSuffix))
: new Debt(id, contact, money, comment, creationDate);
debt.IsPaid = isPaid;
return(debt);
}