Grails Tip: Sorting rows in table when the underlying data structure is a Set (unsorted)

I was having trouble with the display of a list of items in a table.  Each time I refreshed the page the order was different.  This is because the items are coming from a Set, which is unsorted.  I had to add a sort closure to the g:each as illustrated below:

<g:each in="${ quoteInstance?.quoteItems.sort{a,b-> a.id.compareTo(b.id)} }" status="i" var="q">

    <tr class="${(i % 2) == 0 ? 'odd' : 'even'}">

        <td><span class="buttons"><q:button controller="quote" action="selectQuoteItem" class="save" params="['id': quoteInstance?.id, 'quoteItemId':q.id]" value="${message(code: 'default.button.save.label', default: 'Select Quote Item')}" /></span>

        <td>${fieldValue(bean: q, field: 'quantity')}</td>

        <td>${fieldValue(bean: q, field: 'unitOfSale')}</td>

        <td>${fieldValue(bean: q, field: 'unitPrice')}</td>

        <td>${fieldValue(bean: q, field: 'materialGuidePrice')}</td>

        <td>

            <div class="buttons">   

                <q:button controller="quoteItem" action="edit" class="edit" params="['quoteId': quoteInstance?.id, 'id':q.id]" value="${message(code: 'default.button.edit.label', default: 'Edit')}" />

                <q:button controller="quoteItem" action="delete" class="delete" params="['quoteId': quoteInstance?.id, 'id':q.id]" value="${message(code: 'default.button.delete.label', default: 'Delete')}" />

                </div>

        </td>

    </tr>

</g:each>