def get_repositories_by_provider(self, resource_id=None):
pass<EOL>
Gets a ``RepositoryList`` from the given provider ````.

        In plenary mode, the returned list contains all known
        repositories or an error results. Otherwise, the returned list
        may contain only those repositories that are accessible through
        this session.

        arg:    resource_id (osid.id.Id): a resource ``Id``
        return: (osid.repository.RepositoryList) - the returned
                ``Repository list``
        raise:  NullArgument - ``resource_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        *compliance: mandatory -- This method must be implemented.*