proxy and method decorator sequence

test.js

function methodDecorator(target, name, descriptor) {
  const method = descriptor.value;
  descriptor.value = function (...args) {
    method.apply(this, args);
    return this;
  };
}

class Person {
  isSignedIn = false;

  @methodDecorator
  signIn(firstName, lastName) {
    this.isSignedIn = true;
    console.log('signIn end', firstName, lastName);
    return true;
  }
}

class PersonVlad extends Person {
  isVlad = true;
}

const adapter = (instance) => {
  const someHandler = {
    get(target, prop, receiver) {
      if (target[prop] instanceof Function) {
        return function (...args) {
          target[prop].call(this, ...[this, ...args]);
        };
      }

      return Reflect.get(target, prop, receiver);
    },
  };

  return new Proxy(instance, someHandler);
};

const p = adapter(new PersonVlad());
p.signIn('john', 'smith');