I'm trying to modify the thread being displayed on the staff side. I'm in the ticket-view.inc.php and I'm at the following that display the threads

<?php
// Render ticket thread
if ($thread)
$thread->render(
array('M', 'R', 'N'),
array(
'html-id' => 'ticketThread',
'mode' => Thread::MODE_STAFF,
'sort' => $thisstaff->thread_view_order
)
);
?>

I'm confused where the call is being made to. Any suggestions?