code: public BoxRequestsBookmark.CopyBookmark getCopyRequest(String id, String parentId) {
          BoxRequestsBookmark.CopyBookmark request = new BoxRequestsBookmark.CopyBookmark(id, parentId, getBookmarkCopyUrl(id), mSession);
          return request;
      }
docs: Gets a request that copies a bookmark
  
  @param id    id of the bookmark to copy
  @param parentId  id of the parent folder to copy the bookmark into
  @return  request to copy a bookmark