UsesUnboundedPCollections. Beyond that, it is up to the runner and test configuration
 to decide whether to run in streaming mode.@Deprecated
public interface StreamingIT
     @Test
     @Category(StreamingIT.class)
     public void testStreamingPipeline() {
       StreamingOptions options = ...;
       options.setStreaming(true);
       StreamingPipeline.main(...);
     }