code: function assertPlatform(requiredToken) {
      var /** @type {?} */ platform = getPlatform();
      if (!platform) {
          throw new Error('No platform exists!');
      }
      if (!platform.injector.get(requiredToken, null)) {
          throw new Error('A platform with a different configuration has been created. Please destroy it first.');
      }
      return platform;
  }
docs: Checks that there currently is a platform
  which contains the given token as a provider.
  
  \@experimental APIs related to application bootstrap are currently under review.
  @param {?} requiredToken
  @return {?}