public final ParallelFlux<T> doOnRequest(LongConsumer onRequest) {
		Objects.requireNonNull(onRequest, "onRequest");
		return doOnSignal(this, null, null, null, null, null, null, onRequest, null);
	}
public final ParallelFlux<T> doOnRequest(LongConsumer onRequest) {
		Objects.requireNonNull(onRequest, "onRequest");
		return doOnSignal(this, null, null, null, null, null, null, onRequest, null);
	}
public final ParallelFlux < T > doOnRequest ( LongConsumer onRequest ) { Objects . requireNonNull ( onRequest , "onRequest" ) ; return doOnSignal ( this , null , null , null , null , null , null , onRequest , null ) ; }
Call the specified consumer with the request amount if any rail receives a
request.

@param onRequest the callback

@return the new {@link ParallelFlux} instance
Call the specified consumer with the request amount if any rail receives a request .