docs: function(file) {
      for(var i = 0; i < watchList.length; i++) {
          if(watchList[i].file === file) {
              watchers[i].close();
              watchList.splice(i, 1);
              watchers.splice(i, 1);
              return;
          }
      }
      throw new Error(file + " was not being watched previously");
  }