InsoNB

Hey guys! Im trying to replace a sappling, when its growing to a tree, with some other block. I just cant get it to work. The tree will grow anyway. public class TreeGrowEvent { @SubscribeEvent public void onTreeGrow(SaplingGrowTreeEvent e) { e.world.setBlock(e.x, e.y, e.z,Blocks.cactus); e.world.addWeatherEffect(new Lighting(e.world,e.x,e.y,e.z)); } } My custom lightning is happening, but the block doesnt change. What am i doing wrong? I hope someone can enlighten me! Edit: Oh okay, i found the solution: i had to add e.setResult(Result.DENY);