Providers returns a set of dependencies including the Maker, the default *clientv3.Client and the exported configs.

WithConfigInterceptor instructs the Providers to accept the EtcdConfigInterceptor so that users can change config during runtime.

WithReload toggles whether the factory should reload cached instances upon OnReload event.

Option is a type that holds all of available etcd configurations.

Maker is models Factory.

EtcdConfigInterceptor is an injector type hint that allows user to do last minute modification to etcd configurations.

ProvidersOptionFunc is the type of functional providersOption for Providers.