[keycloak-user] Adding multiple custom REST endpoints

The documentation states that if you want to add a custom endpoint, you need to implement the RealmResourceProviderFactory and RealmResourceProvider interfaces. Then the examples show that you create an "org.keycloak.services.resource.RealmResourceProviderFactory" file in the "META-INF/services" directory that references the implementation. But what if I want to have multiple implementations? would these implementations be just listed in the above file "org.keycloak.services.resource.RealmResourceProviderFactory" as comma separated, space separated or what? Thanks for your help, Charles Walker