@utilities.arguments_not_none<EOL><INDENT>def get_books_by_provider(self, resource_id):<DEDENT>
raise errors.Unimplemented()<EOL>
Gets a ``BookList`` from the given provider ````.

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

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