Best practice for exposing a RESTful collection through Falcor about falcor-router HOT 3 OPEN

{
  route: 'allTodos[{ranges:indices}][{keys:attrs}]',
  get({ indices, attrs }) {
     ... return $ref and prop of todosById...
  }
}

// Get data from service call, then construct paths
const properties = pathSet.attrs;
let pathValues = _.map(pathSet.indices, (indice, index) => {
    const todo = data[index];
    let results = { path: ['todos', indice], value: $ref(['todosById', todo.id])};
    results.push.apply(results, todoToPathValues(todo, properties));
    return results;
});
return _.flatten(pathValues);

// Get data from service call, then construct paths
const properties = pathSet.attrs;
let pathValues = _.map(pathSet.todoIds, (id, index) => {
    return todoToPathValues(data[index], properties);
});
return _.flatten(pathValues);

function todoToPathValues(todo, properties) {
    let results = [];
    properties.forEach((key) => {
        results.push({
            path: ['todoById', todo.id, key],
            value: _.get(todo, key, $atom(null))
        });
    });
    return results;
}