getNode method

	public static ClassNode getNode(byte[] bytes) {
		ClassReader cr = new ClassReader(bytes);
		ClassNode cn = new ClassNode();
		try {
		    cr.accept(cn, ClassReader.EXPAND_FRAMES);
		} catch (Exception e) {
			try {
				cr.accept(cn, ClassReader.SKIP_FRAMES | ClassReader.SKIP_DEBUG);
			} catch (Exception e2) {
				return null;
			}
		}
		return cn;
	}