code: function(name, value) {
  			if (typeof metricsAvgStorage[name] === 'undefined') {
  				metricsAvgStorage[name] = [];
  			}
  
  			metricsAvgStorage[name].push(value);
  
  			this.setMetric(name, getAverage(metricsAvgStorage[name]));
  		}
docs: push a value and update the metric if the current average value