"use strict";

module.exports.mixin = function mixin(target, source) {
  const keys = Object.getOwnPropertyNames(source);
  for (let i = 0; i < keys.length; ++i) {
    Object.defineProperty(target, keys[i], Object.getOwnPropertyDescriptor(source, keys[i]));
  }
};

module.exports.wrapperSymbol = Symbol("wrapper");
module.exports.implSymbols = {};

module.exports.wrapperForImpl = function (impl) {
  return impl[module.exports.wrapperSymbol];
};

module.exports.implForWrapper = function (wrapper, name) {
  return wrapper[module.exports.implSymbols[name]];
};

module.exports.implSymbols["EventTarget"] = Symbol("EventTarget implementation");