mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
Label l0 = helper.createLabel();
mv.visitLabel(l0);
mv.visitLineNumber(33, l0);
mv.visitVarInsn(Opcodes.ALOAD, 0);
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, className, "<init>", "()V", false);
Label l1 = helper.createLabel();
mv.visitLabel(l1);
mv.visitLineNumber(31, l1);
mv.visitVarInsn(Opcodes.ALOAD, 0);