api.js

function createFetcher<Params, Return>(endpoint: (params: Params) => string, handler: (obj: any) => Return) {
  return _debounce((params: Params) => {
    fetch(API_BASE_URL + endpoint(params), DEFAULT_GET_OPTIONS)
      .then(response => response.json())
      .then(handler);
  }, 200);
}
export const findMarketingAsset = createFetcher(
  ({ id = null } = {}) => `/assets/${id}`,
  jsonArray => new MarketingAsset(jsonArray[0]),