anchor.diff:  
   
   %% Send the cached value to the requester.
  -return_value(State, {find_else_put, {_Key, _Add_Type, _Req}     = Args}, undefined) -> value_request(State, {add, Args});
  +return_value(State, {find_else_add, {_Key, _Add_Type, _Req}     = Args}, undefined) -> value_request(State, {add, Args});
   return_value(State, {lookup,        {_Key, {Ref, Requester}}          }, undefined) -> coop:relay_data(Requester, {Ref, undefined}),       {State, noop};
   return_value(State, {_Any_Type,     {_Key, {_Ref, _Rqstr} = Requester}}, Coop_Node) -> coop:relay_data(Coop_Node, {get_value, Requester}), {State, noop}.
   
  
positive.code: 
  %% Return the cached value to a dynamic downstream coop_node...
  value_request(State, {lookup,        {Key, _Rcvr}        } = Req) -> return_value(State, Req, get(Key));
  value_request(State, {find_else_put, {Key, _Type, _Rcvr} } = Req) -> return_value(State, Req, get(Key));
  
  %% Return the number of active keys...
  value_request(State, {num_keys, {Ref, Rcvr}}) ->
  
negative.code: 
  -type lookup_request() :: {any(), receiver()}.
  -type fep_request() :: {any(), value_request(), receiver()}.
  -type fetch_cmd() :: lookup | find_else_add.
  
  %% -type stats_cmd() :: num_keys.
  
  