DI element injector resolver

di_element_injector_resolver.ts

const providerDef =
  (allowPrivateServices ? elDef.element!.allProviders :
    elDef.element!.publicProviders)![tokenKey];
if (providerDef) {
  let providerData = asProviderData(searchView, providerDef.nodeIndex);
  if (!providerData) {
    providerData = { instance: _createProviderInstance(searchView, providerDef) };
    searchView.nodes[providerDef.nodeIndex] = providerData as any;
  }
  return providerData.instance;
}