Change lots of blocks lots of quick for lots of MC versions

Bukkit-setBlockSuperFast.java

private static Class<?> blockPositionClass = null;
private static Class<?> blockDataClass = null;
private static Class<?> craftWorldClass = null;

/**
 * Change a given block extremely quickly using NMS & Reflection
 * @param block Block to change
 * @param material Material to set the block to
 * @param data Any associated data for the block's material
 */
public static void setBlockSuperFast(Block block, Material material, int data) {
    int blockId = material.getId();

    try {
        if (blockPositionClass == null) blockPositionClass = Class.forName(nmsClass + ".BlockPosition");
        if (blockDataClass == null) blockDataClass = Class.forName(nmsClass + ".IBlockData");
        if (craftWorldClass == null) craftWorldClass = Class.forName(craftbukkitClass + ".CraftWorld");

        Object world = craftWorldClass.getMethod("getHandle").invoke(craftWorldClass.cast(block.getWorld()));
        Object chunk = world.getClass().getMethod("getChunkAt", int.class, int.class).invoke(world, block.getX() >> 4, block.getZ() >> 4);
        Object blockPosition = blockPositionClass.getConstructor(int.class, int.class, int.class).newInstance(block.getX(), block.getY(), block.getZ());
        int combined = blockId + ((byte) data << 12);
        Object blockData = Class.forName(nmsClass + ".Block").getMethod("getByCombinedId", int.class).invoke(null, combined);
        world.getClass().getMethod("setTypeAndData", blockPositionClass, blockDataClass, int.class).invoke(world, blockPosition, blockData, 2);
        chunk.getClass().getMethod("a", blockPositionClass, blockDataClass).invoke(chunk, blockPosition, blockData);
    } catch (Exception e) {
        System.out.println("Reflection error: " + e.getMessage());
        e.printStackTrace();
        block.setTypeIdAndData(blockId, (byte) data, false);
    }
}