coherence async.js

const BookStore = function(deps) {
  const self = Coherence(deps);
  self.handleAction('search-book', searchBook);
  return self.fluxSafe();
  
  function searchBook(payload) {
    deps.books.fetch(payload.id).then(function(response) {
      self.setData('book', response);
    })
  }
};