public IFinanceStatement Get <T>(Func <IFinanceStatement, bool> predicate) where T : class, IFinanceStatement
{
if (IsExpense(typeof(T)))
{
return(Expenses.Get(predicate));
}
else if (IsIncome(typeof(T)))
{
return(Incomes.Get(predicate));
}
else if (IsInvestment(typeof(T)))
{
return(Investments.Get(predicate));
}
throw new FinanceStatementNotFoundException("not found!");
}