protected function get_broken_dependencies(_WP_Dependency $item, WP_Dependencies $dependencies)
 {
     $broken = array();
     foreach ($item->deps as $handle) {
         if ($dep = $dependencies->query($handle)) {
             $broken = array_merge($broken, $this->get_broken_dependencies($dep, $dependencies));
         } else {
             $broken[] = $item->handle;
         }
     }
     return $broken;
 }

 /**
  * @ticket 21741
  */
 function test_query_and_registered_enqueued()
 {
     $dep = new WP_Dependencies();
     $this->assertTrue($dep->add('one', ''));
     $this->assertInstanceOf('_WP_Dependency', $dep->query('one'));
     $this->assertInstanceOf('_WP_Dependency', $dep->query('one', 'registered'));
     $this->assertInstanceOf('_WP_Dependency', $dep->query('one', 'scripts'));
     $this->assertFalse($dep->query('one', 'enqueued'));
     $this->assertFalse($dep->query('one', 'queue'));
     $dep->enqueue('one');
     $this->assertTrue($dep->query('one', 'enqueued'));
     $this->assertTrue($dep->query('one', 'queue'));
     $dep->dequeue('one');
     $this->assertFalse($dep->query('one', 'queue'));
     $this->assertInstanceOf('_WP_Dependency', $dep->query('one'));
     $dep->remove('one');
     $this->assertFalse($dep->query('one'));
 }

 protected static function get_dependents(_WP_Dependency $script, WP_Dependencies $dependencies)
 {
     // @TODO move this into the collector
     $dependents = array();
     $handles = array_unique(array_merge($dependencies->queue, $dependencies->done));
     foreach ($handles as $handle) {
         if ($item = $dependencies->query($handle)) {
             if (in_array($script->handle, $item->deps)) {
                 $dependents[] = $handle;
             }
         }
     }
     sort($dependents);
     return $dependents;
 }

 function all_deps($handles, $recursion = false)
 {
     $r = parent::all_deps($handles, $recursion);
     if (!$recursion) {
         $this->to_do = apply_filters('print_scripts_array', $this->to_do);
     }
     return $r;
 }

 /**
  * @param mixed $handles
  * @param bool $recursion
  * @param mixed $group
  * @return bool
  */
 public function all_deps($handles, $recursion = false, $group = false)
 {
     $r = parent::all_deps($handles, $recursion);
     if (!$recursion) {
         /**
          * Filter the array of enqueued styles before processing for output.
          *
          * @since 2.6.0
          *
          * @param array $to_do The list of enqueued styles about to be processed.
          */
         $this->to_do = apply_filters('print_styles_array', $this->to_do);
     }
     return $r;
 }

 public function all_deps($handles, $recursion = false, $group = false)
 {
     $r = parent::all_deps($handles, $recursion);
     if (!$recursion) {
         /**
          * Filter the list of script dependencies left to print.
          *
          * @since 2.3.0
          *
          * @param array $to_do An array of script dependencies.
          */
         $this->to_do = apply_filters('print_scripts_array', $this->to_do);
     }
     return $r;
 }