~TNT~

Hey Guys....
1) If A TNT explode only the glass blocks should be destroyed (How to Do?)
2) to use this what I must use?
ExplodeA or ExplodeB??
Thanks in advance...

PHP:

public function onExplode(EntityExplodeEvent $event){
 $block = $event->getBlockList();
 foreach ($block as $blocks){
  if (!$blocks instanceof Grass){
   unset($block[array_search($blocks, $block)]);
  }
 }
 $event->setBlockList($block);
}