anchor.diff:  %% --------------------------------------------------------------------------------------------------------------------
   
   init([]) ->
  -	State = #state{
  -		entities = []
  -	},
  -
   	% Join the entity_engines process group.
   	pg2:create(entity_engines),
   	pg2:join(entity_engines, self()),
  
positive.code: 	erlang:send_after(?FULL_INTERVAL, self(), {full_update, EntityID}),
  
  	State#state {
  		entities = dict:append(EntityID, Entity, Entities)
  	}.
  
  
  
negative.code: -include("pre_entity.hrl").
  
  % API
  -export([start_link/0]).
  -export([add_entity/2, remove_entity/2, get_entity/2]).
  -export([client_request/6, client_event/5]).
  
  % Internal
  