public synchronized Page<String> listAllValidDatasets(short accountId, short containerId, String pageToken) throws SQLException {
    return datasetDao.listAllValidDatasets(accountId, containerId, pageToken);
  }
Get all valid datasets of the container start with page token.
@param accountId the id for the parent account.
@param containerId the id of the container.
@param pageToken the start page token, if it's null, will start at beginning.
@return the page of the dataset names.
@throws SQLException
ambry-account/src/main/java/com/github/ambry/account/mysql/MySqlAccountStore.java