Adding limit and offset parameters

I'm trying to output details for a single category, for an Entry (ie. just the first one found with a specific Parent) like this:

{exp:category_construct:categories entry_id="{entry_id}" group_id="1" parent_id="14" limit="1"} {construct:cat_url_title} {/exp:category_construct:categories}

...but I've had to use the following additional PHP loop counter instead to only display one result:

{exp:category_construct:categories entry_id="{entry_id}" group_id="1" parent_id="14"}

<?php
	if ($loop == 0) { echo "{construct:cat_url_title}"; }
	$loop++;
?>

{/exp:category_construct:categories}

It would be awesome if could add 'limit' and 'offset' parameters, so we can more easily control what's displayed, in a similar manner as the standard EE parameters. :-)