Implementing the Decorator Pattern about stampit HOT 5 CLOSED

const GreetDecorator = stampit.composers(({ stamp }) => {
    const { greet } = stamp.compose.methods || {};
    if (!greet || greet.wrapped) return;

    function greetWrapper(...args) {
      greet.apply(this, args);
      console.log('this is new!!!');
    }
    greetWrapper.wrapped = true;
    stamp.compose.methods.greet = greetWrapper;
  }
});

const MethodDecorator = stampit.statics({
    decorateMethod(name, func) {
      return this.composers(({ stamp }) => {
        const method = stamp.compose.methods || stamp.compose.methods[name];
        if (!method || method.wrapped) return;

        function methodWrapper(...args) {
          method.apply(this, args);
          func.apply(this, args);
        }
        methodWrapper.wrapped = true;
        stamp.compose.methods.method = methodWrapper;
      }
    })
});

MyStamp = MyStamp.compose(MethodDecorator).decorateMethod("greet", function () {
  console.log('this is new!!!');
});