code: function(dirs, callback) {
        var t = this,
            numLeft = dirs.length,
            fileRegexp = /.json$/,
            trimmed = [];
  
        // Already trimmed
        if (numLeft === 0) {
          return callback(null, dirs);
        }
  
        // Process each directory
        dirs.forEach(function(dir) {
          t.hasContents(dir.path, fileRegexp, function(error, hasContents) {
            if (error) {
              numLeft = 0;
              return callback(error);
            }
            delete dir.path;
            if (hasContents) {
              trimmed.push(dir);
            }
            if (--numLeft === 0) {
              return callback(null, trimmed);
            }
          });
        });
      }
docs: Trim directories that have no content
  
  This accepts an array of objects, where each object must have a 'path' element.
  If no content is at the path, the object will be trimmed from the array.
  
  The path element will be removed after checking.
  
  @method trimDirs
  @param dirs {Object} An object that contains a 'path' element
  @param callback {function(error, trimmed)} Called when complete (or error)