code: Session getStorageSession() throws RepositoryException
     {
        try
        {
           ManageableRepository repository = getWorkingRepository();
  
           String workspaceName = storageWorkspace;
           if (workspaceName == null)
           {
              workspaceName = repository.getConfiguration().getDefaultWorkspaceName();
           }
  
           return repository.getSystemSession(workspaceName);
        }
        catch (RepositoryConfigurationException e)
        {
           throw new RepositoryException("Can not get system session", e);
        }
     }
docs: Return system Session to org-service storage workspace. For internal use
  only.
  
  @return system session
  @throws RepositoryException if any Exception is occurred