World world = Minecraft.getMinecraft().theWorld;
Block block = world.getBlock(pos.posX, pos.posY, pos.posZ);
drawWireframe : {
if(block != null) {
AxisAlignedBB axis;
if(block instanceof IWireframeAABBProvider)
axis = ((IWireframeAABBProvider) block).getWireframeAABB(world, pos.posX, pos.posY, pos.posZ);
else axis = block.getSelectedBoundingBoxFromPool(world, pos.posX, pos.posY, pos.posZ);