anchor.diff:  get_callgraph(SearchPaths) ->
       gen_server:call(wrangler_callgraph_server, {get, SearchPaths}, infinity).
   
  +-spec(get_sccs_including_fun/2::({modulename(),functionname(), arity()}, [dir()]) -> scc_order()).
  +get_sccs_including_fun({M, F, A}, SearchPaths) ->    
  +    gen_servers:call(wrangler_callgraph_server, {get_fun_sccs, {M,F, A}, SearchPaths}).
   
   %%--------------------------------------------------------------------
   %%% Internal functions
  
positive.code: 	     {reply, #callgraph{}, #state{}}).
  handle_call({get, SearchPaths}, _From, State) ->
      {Reply, State1} = get_callgraph(SearchPaths, State),
      {reply, Reply, State1}.
  
  %%--------------------------------------------------------------------
  
negative.code: -include("../hrl/wrangler.hrl").
  
  %% API
  -export([start_callgraph_server/0, get_callgraph/1, get_sccs_including_fun/2]).
  
  %% gen_server callbacks
  -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
  