                     @_feed = feed
                     @_feed.on 'change', @_handle_change
                     cb()
+    _dbg: (f) =>
+        return @_db._dbg("Tracker.#{f}")
 
     close: =>
         @emit('close')

            # requests pile up!).
            @_db.once('connect', @close)
            cb(undefined, @)

    close: (cb) =>
        @emit('close', {action:'close'})

        delete @_users[project_id][account_id]
        delete @_projects[account_id][project_id]

    # Register the given account so that this client watches the database
    # in order to be aware of all projects and collaborators of the
    # given account.
    register: (opts) =>
        opts = defaults opts,
            account_id : required
