wordpress - Creating sub nav using wp_list_pages(); -

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i'm using following code produce list of pages bottom 2 levels of wordpress page hierarchy:

<?php if($post->ancestors){     $ancestors = end($post->ancestors);     $children = wp_list_pages("title_li=&child_of=".$ancestors.""); } ?>

this seems bring in pages higher last 2 levels though. there can add the code above make list bottom 2 level pages?


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