code: function traverser(element, content, next) {
      return function () {
        return minimize.traverse(element.children, content, sync, step(element, 'close', next))
      };
    }
docs: For all children run same iterator.
  
  @param {Object} element Current element
  @param {String} content Current minimized HTML, memo.
  @param {Function} next Completion callback.
  @returns {Function} Runner.
  @api private