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