anchor.diff:      derflow_vnode:is_det(Id).
   
   thread(Module, Function, Args) ->
  -    {ok, Pid} = derflow_vnode:thread(Module, Function, Args),
  -    {ok, Pid}.
  +    derflow_vnode:thread(Module, Function, Args).
   
   wait_needed(Id) ->
       derflow_vnode:wait_needed(Id).
  
positive.code:     end.
  
  bind(Id, Module, Function, Args) ->
      Value = Module:Function(Args),
      bind(Id, Value).
  
  read(Id) ->
      {ok, Value, _Next} = derflow_vnode:read(Id),
  
negative.code:     declare(undefined).
  
  declare(Type) ->
      derflow_vnode:declare(druuid:v4(), Type).
  
  bind(Id, Value) ->
      case derflow_vnode:bind(Id, Value) of
  