Modify the SearchWP search terms after all sanitization has taken place

gistfile1.php

<?php
 
function my_searchwp_pre_search_terms( $terms, $engine )  {
  if ( 'myengine' == $engine ) {
    // do something with the terms
  }

  return $terms;
}
 
add_filter( 'searchwp_pre_search_terms', 'my_searchwp_pre_search_terms', 10, 2 );