@Override
	protected String toDSL() {
		return String.format("tail --nativeOptions='-F -n +0' --name=%s --fileDelay=%d", fileName, delayInMillis);
	}
Construct a SimpleTailSource using the provided delay and filename

@param delayInMillis millsecond to delay tailing
@param fileName file to tail
spring-xd-test-fixtures/src/main/java/org/springframework/xd/test/fixtures/SimpleTailSource.java