code: function getUriMappers (serviceLocator) {
    var routeDefinitions;
  
    try {
      routeDefinitions = serviceLocator.resolveAll('routeDefinition');
    } catch (e) {
      routeDefinitions = [];
    }
  
    return routeDefinitions
      .map(route => {
        var mapper = routeHelper.compileRoute(route.expression);
  
        return {
          expression: mapper.expression,
          map: route.map || noop,
          argsMap: uri => {
            var args = mapper.map(uri);
            Object.assign(args, route.args);
            return args;
          }
        };
      });
  }
docs: Gets list of URI mappers.
  @param {ServiceLocator} serviceLocator Service locator to get route
  definitions.
  @returns {Array} List of URI mappers.