// this.metaClass = <value>
            methodVisitor.visitFieldInsn(Opcodes.PUTFIELD, className, META_CLASS_FIELD, META_CLASS_TYPE.getDescriptor());

            // return this.metaClass
            methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
            methodVisitor.visitFieldInsn(Opcodes.GETFIELD, className, META_CLASS_FIELD, META_CLASS_TYPE.getDescriptor());

        super.visitInsn(IRETURN);
    }

    public void _RETURN() {
        super.visitInsn(RETURN);
    }

    public void _PUTFIELD(String owner, String name, String descriptor) {
        super.visitFieldInsn(PUTFIELD, owner, name, descriptor);
    }

    public void _PUTFIELD(String owner, String name, Type fieldType) {
        _PUTFIELD(owner, name, fieldType.getDescriptor());
    }

            public void visitTypeInsn(int i, String name) {
                mv.visitTypeInsn(i, remap(name));
            }

            @Override
            public void visitFieldInsn(int opcode, String owner, String name, String desc) {
                mv.visitFieldInsn(opcode, remap(owner), name, remap(desc));
            }

            @Override