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<?php

add_filter( 'hwp_display_notification', function( $show_it, $box_id, $post_id ) {

  if(  $post_id == '12' && $box_id == '234' )
    $show_it = true;

  // you should not return false unless you want to override all other filters. It's best to either return true, or just return $show_it
  return $show_it;

}, 10, 3 );