public <T>TStream<T> traceStream(TStream<T> stream,Supplier<String> label){
  if (includeTraceStreamOps(label.get())) {
    TStream<?> s=stream.filter(traceTuplesFn(label.get()));
    s.peek(null);
  }
  return stream;
}

public < T > TStream < T > traceStream ( TStream < T > stream , Supplier < String > label ) { if ( includeTraceStreamOps ( label . get ( ) ) ) { TStream < ? > s = stream . filter ( traceTuplesFn ( label . get ( ) ) ) ; s . peek ( null ) ; } return stream ; }
trace a stream to system . out if the " label " has been configured to enable tracing . < p > if tracing has not been enabled in the config , the topology will not be augmented to trace the stream .
