text: // Copyright 2015 Traceur Authors.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  const $WeakMap = typeof WeakMap === 'function' ? WeakMap : undefined;
  
  export function isPrivateSymbol(s) {
    return false;
  }
  
  export function createPrivateSymbol() {
    return new $WeakMap();
  }
  
  export function hasPrivate(obj, sym) {
    return sym.has(obj);
  }
  
  export function deletePrivate(obj, sym) {
    return sym.delete(obj);
  }
  
  export function setPrivate(obj, sym, val) {
    sym.set(obj, val);
  }
  
  export function getPrivate(obj, sym) {
    return sym.get(obj);
  }
  
  export function init() {}
  