code: function(root, fileStats, next) {
          var self = this;
  
          var file = path.join(root, fileStats.name);
  
          if (minimatch(file, self._options.filePattern, {
              dot: true
          })) {
              self._processFile(file)
                  .then(function(config) {
                      next();
                  });
          } else {
              next();
          }
      }
docs: Listener which will be invoked when a file whiting the provided folder is found
  
  @method _onWalkerFile
  @protected
  @param {String} root The root directory of the file
  @param {Object} fileStats Object with data about the file
  @param {Function} next A callback function to be called once the file is processed