private String getLogString(String message, String taskName) {
		return BatchTask.constructLogString(message, taskName, this);
	}
private String getLogString ( String message , String taskName ) { return BatchTask . constructLogString ( message , taskName , this ) ; }
Utility function that composes a string for logging purposes. The string includes the given message and
the index of the task in its task group together with the number of tasks in the task group.

@param message The main message for the log.
@param taskName The name of the task.
@return The string ready for logging.