void readData(final YangInstanceIdentifier path, SettableFuture<Optional<NormalizedNode<?, ?>>> proxyFuture);
void dataExists(YangInstanceIdentifier path, SettableFuture<Boolean> proxyFuture);
void readData(final YangInstanceIdentifier path, SettableFuture<Optional<NormalizedNode<?, ?>>> proxyFuture);
void dataExists(YangInstanceIdentifier path, SettableFuture<Boolean> proxyFuture);