 
   # Forget everything we know about dependency state.
   _reset: ->
-    @_count = {}
+    @_dependency_count = {}
     @_state = {}
     @deps = {}
     @_control_channel.reset()

  # zero, it is rescheduled.
  _progress: (keys) ->
    for key in keys
      unless --@_count[key]
        @_reschedule key

  # Clear the timeout for idling

  
  # Remove given dependencies from the key
  _remove_dependencies: (key, deps) ->
    @_dependency_count[key] -= deps.length
    @deps[dep] = _.without @deps[dep], key for dep in deps
  
  # Recovery failed, let the callback know about it.
