code: public Session login() throws RepositoryException {
  
          if (this.isActive(this.anonSession)) {
              //perform a refresh to update the session to the latest repository version
              this.anonSession.refresh(false);
          } else {
              this.anonSession = this.repository.login();
          }
  
          return this.anonSession;
      }
docs: Logs into the repository as anonymous user. The session should be logged out after each test if the repository is
  used as a {@link org.junit.ClassRule}.
  @return
  a session for the anonymous principal. In most default configurations the anonymous user has only read
  permissions.
  @throws RepositoryException
  if the login failed for any reason