code: function (bookmark, paras) {
                  var so = bookmark.s.offset;
                  var eo = bookmark.e.offset;
                  var sc = dom.fromOffsetPath(list.head(paras), bookmark.s.path);
                  var ec = dom.fromOffsetPath(list.last(paras), bookmark.e.path);
  
                  return new WrappedRange(sc, so, ec, eo);
              }
docs: @method
  
  create WrappedRange from paraBookmark
  
  @param {Object} bookmark
  @param {Node[]} paras
  @return {WrappedRange}