Function getServiceInternal

src/service-helpers.js:340–360

* Get service `id` from `holder`. Assumes the service * has already been registered. * @param {!Object} holder Object holding the service instance. * @param {string} id of the service. * @return {object}

(holder, id)

 * @return {object}
 */
function getServiceInternal(holder, id) {
  devAssert(
    isServiceRegistered(holder, id),
    `Expected service ${id} to be registered`
  );
  const services = getServices(holder);
  const s = services[id];
  if (!s.obj) {
    devAssert(s.ctor, `Service ${id} registered without ctor nor impl.`);
    devAssert(s.context, `Service ${id} registered without context.`);
    s.obj = new s.ctor(s.context);
    devAssert(s.obj, `Service ${id} constructed to null.`);
    s.context = null;
    // The service may have been requested already, in which case we have a
    // pending promise we need to fulfill.
    if (s.resolve) {
      s.resolve(s.obj);
    }
  }
  return s.obj;
}

/**
 * @param {!Object} holder Object holding the service instance.