private String getApiIndex(Api api) {
        return getApiIndex(api.getOrganizationId(), api.getApiId(), api.getVersion());
    }
@author Marc Savy {@literal <marc@rhymewithgravy.com>}
gateway/engine/vertx-shareddata/src/main/java/io/apiman/gateway/engine/vertx/shareddata/SharedGlobalDataRegistry.java