public static class Builder extends BaseProviderMetadata.Builder {
protected Builder(){
id("rackspace-cloudblockstorage-us")
.name("Rackspace Next Generation Cloud Block Storage US")
.apiMetadata(new CinderApiMetadata().toBuilder()
.identityName("${userName}")
.credentialName("${apiKey}")
.defaultEndpoint("https://identity.api.rackspacecloud.com/v2.0/")
.endpointName("identity service url ending in /v2.0/")
.documentation(URI.create("http://docs.rackspace.com/cbs/api/v1.0/cbs-devguide/content/overview.html"))