text: module.exports = loadWatchers;
  var forEachLine = require('./for-each-line-in-csv.js');
  
  function loadWatchers(fileName, doneCb) {
    var userRepo = new Map();
    var repoUsers = new Map();
  
    forEachLine(fileName, processLine, done);
  
    function processLine(user, repo) {
      addToMap(userRepo, user, repo);
      addToMap(repoUsers, repo, user);
    }
  
    function done() {
      doneCb(repoUsers, userRepo);
    }
  
    function addToMap(map, key, value) {
      var set = map.get(key);
      if (set) set.add(value);
      else map.set(key, new Set([value]));
    }
  }
  