See: Description
| Class | Description | 
|---|---|
| GroupAlsoByWindowViaOutputBufferFn<K,InputT,W extends BoundedWindow> | A FlatMap function that groups by windows in batch mode using  ReduceFnRunner. | 
| NoOpStepContext | A  StepContextfor Spark Batch Runner execution. | 
| SparkSideInputReader | A  SideInputReaderfor the Spark Batch Runner. |