/**
* Checks if the parameter is a valid adjustment id
* @param $id int
* @return Adjustment object if $id is found, otherwise false
*/
private function __checkExistence($id)
{
if (!is_null($id) && $id != '') {
$adjustment = Adjustment::find($id);
if (is_null($adjustment)) {
return false;
}
return $adjustment;
}
return false;
}
