code: public void fatal(String correlationId, String message, Object... args) {
  		formatAndWrite(LogLevel.Fatal, correlationId, null, message, args);
  	}
docs: Logs fatal (unrecoverable) message that caused the process to crash.
  
  @param correlationId (optional) transaction id to trace execution through
  call chain.
  @param message       a human-readable message to log.
  @param args          arguments to parameterize the message.