if (timestamp == null) timestamp= "20040625";
	public static synchronized IEvaluator getDefaultEvaluator() {		if (fgDefaultEvaluator == null) {			fgDefaultEvaluator= new Evaluator();						String driver= System.getProperty(DRIVER_SYSTEM_PROPERTY);			if (driver == null)				driver= Platform.getDebugOption(PLUGIN_ID + DRIVER_OPTION);			if (driver == null)				driver= "3.0"; //$NON-NLS-1$			String timestamp= System.getProperty(TIMESTAMP_SYSTEM_PROPERTY);			if (timestamp == null)				timestamp= Platform.getDebugOption(PLUGIN_ID + TIMESTAMP_OPTION);			if (timestamp == null)				timestamp= "20040625"; //$NON-NLS-1$						fgDefaultEvaluator.setReferenceFilterProperties(driver, timestamp);						AssertChecker cpu= new RelativeBandChecker(PerfMsrDimensions.CPU_TIME, 0.0F, 1.0F);			AssertChecker mem= new RelativeBandChecker(PerfMsrDimensions.WORKING_SET, 0.0F, 1.0F);						fgDefaultEvaluator.setAssertCheckers(new AssertChecker[] { cpu, mem });		}		return fgDefaultEvaluator;	}