text: import { root } from '../util/root';
  export function getSymbolObservable(context) {
      let $$observable;
      let Symbol = context.Symbol;
      if (typeof Symbol === 'function') {
          if (Symbol.observable) {
              $$observable = Symbol.observable;
          }
          else {
              $$observable = Symbol('observable');
              Symbol.observable = $$observable;
          }
      }
      else {
          $$observable = '@@observable';
      }
      return $$observable;
  }
  export const $$observable = getSymbolObservable(root);
  //# sourceMappingURL=observable.js.map