# File lib/ruote/evt/tracker.rb, line 102
    def remove_tracker (fei, doc=nil)

      doc ||= @context.storage.get_trackers

      doc['trackers'].delete(Ruote.to_storage_id(fei))

      r = @context.storage.put(doc)

      remove_tracker(fei, r) if r
        # the put failed, have to redo the work
    end