--- /dev/null
+'use strict'
+var EventEmitter = require('events').EventEmitter
+var util = require('util')
+
+var trackerId = 0
+var TrackerBase = module.exports = function (name) {
+ EventEmitter.call(this)
+ this.id = ++trackerId
+ this.name = name
+}
+util.inherits(TrackerBase, EventEmitter)