MethodNode method = new MethodNode(ACC_PUBLIC, "<init>", "()V", null, null)
method.instructions.insert(new VarInsnNode(ALOAD, 0))
method.instructions.insert(new MethodInsnNode(INVOKESPECIAL, superName, "<init>", "()V"))
method.instructions.insert(new InsnNode(RETURN))
clazz.methods.add(method)