text: const oP = {
      foo: 10
  };
  
  const handler = {
      get(obj, prop) {
          if (!Reflect.has(obj, prop)) {
              throw new Error(`Unknown property ${prop} in target object!`);
          }
  
          return Reflect.get(obj, prop) ** 2;
      },
      set(obj, prop, value) {
          if (typeof value !== "number") {
              throw new TypeError("value must be a number");
          }
  
          Reflect.set(obj, prop, value);
          return true;
      }
  }
  
  module.exports = new Proxy(oP, handler);
  