/** * Creates a {@link ParDo} {@link PTransform} that will invoke the given {@link DoFn} function. * * <p>The resulting {@link PTransform PTransform} is ready to be applied, or further properties * can be set on it first. */ public static <InputT, OutputT> SingleOutput<InputT, OutputT> of(DoFn<InputT, OutputT> fn) { validate(fn); return new SingleOutput<>(fn, Collections.emptyList(), displayDataForFn(fn)); }