Readbean one to many

gistfile1.txt

$invoice = R::dispense('invoice');
    $invoice->Customer = 'Greg';
    $lineItems = R::dispense('lineitem', 2);
    $lineItems[0]->LineNumber = 1;
    $lineItems[0]->Amount = 2.50;
    $lineItems[1]->LineNumber = 2;
    $lineItems[1]->Amount = 10.00;
    $invoice->ownLineItem = $lineItems;