mv.visitInsn(Opcodes.ARETURN);
Label lEnd = new Label();
mv.visitLabel(lEnd);
mv.visitLocalVariable("this", "L" + newClassName + ";", null, lBegin, lEnd, 0);
mv.visitLocalVariable("o", "Ljava/lang/Object;", null, lBegin, lEnd, 1);
mv.visitLocalVariable("ret", "Ljava/util/List;", "Ljava/util/List<Ljava/lang/Object;>;",
lBegin, lEnd, 2);
mv.visitLocalVariable("ok", "L" + periodToSlashes(wrapperClass.getName()) + ";",
null, lBegin, lEnd, 3);