code: public static void addNamedOutputContext(Job job, String namedOutput, String key, String value) {
  		// Check that this named output has been configured before
  		Configuration conf = job.getConfiguration();
  		// Add specific configuration
  		conf.set(MO_PREFIX + namedOutput + CONF + "." + key, value);
  	}
docs: Added this method for allowing specific (key, value) configurations for each Output. Some Output Formats read
  specific configuration values and act based on them.
  
  @param namedOutput
  @param key
  @param value