@Override
    public void getClient(String organizationId, String clientId, String clientVersion, IAsyncResultHandler<Client> handler) {
        String idx = getClientIndex(organizationId, clientId, clientVersion);
        objectMap.get(idx, handleResult(handler));
    }
@author Marc Savy {@literal <marc@rhymewithgravy.com>}
gateway/engine/vertx-shareddata/src/main/java/io/apiman/gateway/engine/vertx/shareddata/SharedGlobalDataRegistry.java