DirectParDo tests direct form output DoFns.

DirectParDoAfterGBK generates a pipeline with a direct-form ParDo after a GBK.

EmitParDo tests emit form output DoFns.

EmitParDoAfterGBK generates a pipeline with a emit-form ParDo after a GBK.

LPErrorPipeline constructs a pipeline that has a GBK followed by a CoGBK using the same input, with schema encoded structs as elements.

LPErrorReshufflePipeline checks a Row type with reshuffle transforms.

MixedOutputParDo tests mixed direct + emit form output DoFns.

MultiEmitParDo tests double emit form output DoFns.

FruitCounterName is the name of the fruit counter metric.

MetricNamespace is the namespace for regression test metrics.