code: private String[] childrenFor( ITransaction transaction,
                                    ResolvedRequest request ) throws RepositoryException {
          return ((JcrSessionTransaction)transaction).childrenFor(request);
      }
docs: Determine the names of the children given the supplied request
  
  @param transaction the active transaction; may not be null
  @param request the resolved request; may not be null and must contain a repository name and workspace name
  @return the children names, or null if there are no children
  @throws RepositoryException if is a problem accessing the repository