@HasPermissionAnyDecorator('hg.admin')

    def update_repo_group(self, repogroupid, group_name=None,

                          description=None,

                          owner=None,

                          parent=None):

        repo_group = get_repo_group_or_error(repogroupid)

        parent_repo_group_id = None if parent is None else get_repo_group_or_error(parent).group_id

        updates = {}

        try:

            store_update(updates, group_name, 'group_name')

            raise JSONRPCError('failed to delete gist ID:%s'

                               % (gist.gist_access_id,))

    # permission check inside

    def get_changesets(self, repoid, start=None, end=None, start_date=None,

                       end_date=None, branch_name=None, reverse=False, with_file_list=False, max_revisions=None):

        repo = get_repo_or_error(repoid)

        if not HasRepoPermissionLevel('read')(repo.repo_name):

            raise JSONRPCError('Access denied to repo %s' % repo.repo_name)

        format = "%Y-%m-%dT%H:%M:%S"

        try:

                                                 reverse, max_revisions)]

        except EmptyRepositoryError as e:

            raise JSONRPCError('Repository is empty')

    # permission check inside

    def get_changeset(self, repoid, raw_id, with_reviews=False):

        repo = get_repo_or_error(repoid)

        if not HasRepoPermissionLevel('read')(repo.repo_name):

            raise JSONRPCError('Access denied to repo %s' % repo.repo_name)

        changeset = repo.get_changeset(raw_id)

        if isinstance(changeset, EmptyChangeset):

            raise JSONRPCError('Changeset %s does not exist' % raw_id)