anchor.diff:  manual_blacklist(Node, True) ->
       gen_server:call(?MODULE, {manual_blacklist, Node, True}).
   
  +% called from remote nodes
  +-spec get_worker_jobpack(pid(), nonempty_string()) -> binary().
  +get_worker_jobpack(Master, JobName) ->
  +    gen_server:call({?MODULE, Master}, {jobpack, JobName}).
  +
   %% ===================================================================
   %% gen_server callbacks
   
  
positive.code: 
  handle_call(get_num_cores, _, S) ->
      {reply, do_get_num_cores(S), S};
  
  handle_call({kill_job, JobName}, _From, S) ->
      {reply, do_kill_job(JobName), S};
  
negative.code: -export([start_link/0, stop/0]).
  -export([update_config_table/2, get_active/1, get_nodeinfo/1,
           new_job/3, kill_job/1, kill_job/2, purge_job/1, clean_job/1,
           new_task/2, connection_status/2, manual_blacklist/2,
           get_worker_jobpack/2]).
  -export([init/1, handle_call/3, handle_cast/2, handle_info/2,
           terminate/2, code_change/3]).
  
  