code: public DataSink<T> writeAsCsv(String filePath) {
  		return writeAsCsv(filePath, CsvOutputFormat.DEFAULT_LINE_DELIMITER, CsvOutputFormat.DEFAULT_FIELD_DELIMITER);
  	}
docs: Writes a {@link Tuple} DataSet as CSV file(s) to the specified location.
  
  <p><b>Note: Only a Tuple DataSet can written as a CSV file.</b>
  
  <p>For each Tuple field the result of {@link Object#toString()} is written.
  Tuple fields are separated by the default field delimiter {@code "comma" (,)}.
  
  <p>Tuples are are separated by the newline character ({@code \n}).
  
  @param filePath The path pointing to the location the CSV file is written to.
  @return The DataSink that writes the DataSet.
  
  @see Tuple
  @see CsvOutputFormat
  @see DataSet#writeAsText(String) Output files and directories