void constructor() {
GeneratorAdapter ctor = generator(ACC_PUBLIC, method("<init>", desc(void.class)));
ctor.loadThis();
ctor.invokeConstructor(getType(Object.class), method("<init>", desc(void.class)));
ctor.returnValue();
ctor.endMethod();
}
void bindTo(Handle handle, Object arg) {
push(handle);
compile(arg, false);