code: protected String getMetricUrl(String metricToAnnotate, long triggerFiredTime) {
  		long start = triggerFiredTime - (6L * DateTimeConstants.MILLIS_PER_HOUR);
  		long end = Math.min(System.currentTimeMillis(), triggerFiredTime + (6L * DateTimeConstants.MILLIS_PER_HOUR));
  		String expression = MessageFormat.format("{0,number,#}:{1,number,#}:{2}", start, end, metricToAnnotate);
  		return getExpressionUrl(expression);
  	}
docs: Returns the URL linking back to the metric for use in alert notification.
  
  @param   metricToAnnotate  The metric to annotate.
  @param   triggerFiredTime  The epoch timestamp when the corresponding trigger fired.
  
  @return  The fully constructed URL for the metric.