* @param transport the transport used to create the repository accessor
     * @return a dependency injecting instantiator, aware of services we want to expose
     */
    ImplicitInputsCapturingInstantiator createInjectorForMetadataSuppliers(final RepositoryTransport transport, InstantiatorFactory instantiatorFactory, final URI rootUri, final FileStore<String> externalResourcesFileStore) {
        DefaultServiceRegistry registry = new DefaultServiceRegistry();