code: public BoxRequestsFile.UpdateFile getMoveRequest(String id, String parentId) {
          BoxRequestsFile.UpdateFile request = new BoxRequestsFile.UpdateFile(id, getFileInfoUrl(id), mSession);
          request.setParentId(parentId);
          return request;
      }
docs: Gets a request that moves a file to another folder
  
  @param id        id of file to move
  @param parentId  id of parent folder to move file into
  @return      request to move a file