my $itemtype = $item->effective_itemtype;

    my $itemtype = Koha::ItemTypes->find( $item->effective_itemtype );

    my $notforloan_per_itemtype = Koha::ItemTypes->find($itemtype)->notforloan;

    my $notforloan_per_itemtype = defined $itemtype ? $itemtype->notforloan : 0;

            - "to an item's callnumber. (This can contain multiple subfields to look in; for instance <code>082ab</code> would look in 082 subfields a and b.)<br />Examples (for MARC21 records): <strong>Dewey</strong>: <code>082ab</code> or <code>092ab</code>; <strong>LOC</strong>: <code>050ab</code> or <code>090ab</code>; <strong>from the item record</strong>: <code>852hi</code>"

            - "to an item's callnumber. (This can contain multiple subfields to look in; for instance <code>082ab</code> would look in 082 subfields a and b.)</br>Note: The order of the subfields in the record will be preserved.<br />Examples (for MARC21 records): <strong>Dewey</strong>: <code>082ab</code> or <code>092ab</code>; <strong>LOC</strong>: <code>050ab</code> or <code>090ab</code>; <strong>from the item record</strong>: <code>852hi</code>"