code: @Processor
      public Object logError(
      	String message, 
      	@Optional String integrationScenario, 
      	@Optional String contractId, 
      	@Optional String correlationId,
      	@Optional Map<String, String> extra) {
  
      	return doLog(LogLevelType.ERROR, message, integrationScenario, contractId, correlationId, extra);
      }
docs: Log processor for level ERROR
  
  {@sample.xml ../../../doc/SoitoolkitLogger-connector.xml.sample soitoolkitlogger:log}
  
  @param message Log-message to be processed
  @param integrationScenario Optional name of the integration scenario or business process
  @param contractId Optional name of the contract in use
  @param correlationId Optional correlation identity of the message
  @param extra Optional extra info
  @return The incoming payload