SpawnEntity on event

So I have an event which is when a FallingBlock hits the ground, so how would I create a primed tnt on the spot at where the FallingBlock was?

My event:

Code:java

if (event.getEntity() instanceof FallingBlock); {
 
                        }

Why is it when I put in:

Code:java

if (event.getEntity() instanceof FallingBlock); {
                            FallingBlock.setType(Material.AIR);
                        }

It red underlines setType... It says setType is undefined for FallingBlock....

Bump???
Any help would be awesome

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

You never called the entity a fallingblock, only checked if it was one. So name the entity as a falling block then set its type