code: @PublicEvolving
  	public DataStreamSink<T> print(String sinkIdentifier) {
  		PrintSinkFunction<T> printFunction = new PrintSinkFunction<>(sinkIdentifier, false);
  		return addSink(printFunction).name("Print to Std. Out");
  	}
docs: Writes a DataStream to the standard output stream (stdout).
  
  <p>For each element of the DataStream the result of {@link Object#toString()} is written.
  
  <p>NOTE: This will print to stdout on the machine where the code is executed, i.e. the Flink
  worker.
  
  @param sinkIdentifier The string to prefix the output with.
  @return The closed DataStream.