public function overpayment_refund($loanproduct, $data)
{
$posting = new Loanposting();
$posting->loanproduct()->associate($loanproduct);
$posting->transaction = 'overpayment_refund';
$posting->debit_account = array_get($data, 'loan_overpayment');
$posting->credit_account = array_get($data, 'cash_account');
$posting->save();
}
