@utilities.arguments_not_none<EOL><INDENT>def get_objective_sequencing_session_for_objective_bank(self, objective_bank_id, proxy):<DEDENT>
if not self.supports_objective_sequencing():<EOL><INDENT>raise errors.Unimplemented()<EOL><DEDENT>return sessions.ObjectiveSequencingSession(objective_bank_id, proxy, self._runtime)<EOL>
Gets the ``OsidSession`` associated with the objective sequencing service for the given objective bank.

        arg:    objective_bank_id (osid.id.Id): the ``Id`` of the
                objective bank
        arg:    proxy (osid.proxy.Proxy): a proxy
        return: (osid.learning.ObjectiveSequencingSession) - an
                ``ObjectiveSequencingSession``
        raise:  NotFound - ``objective_bank_id`` not found
        raise:  NullArgument - ``objective_bank_id`` or ``proxy`` is
                ``null``
        raise:  OperationFailed - ``unable to complete request``
        raise:  Unimplemented - ``supports_objective_sequencing()`` or
                ``supports_visible_federation()`` is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_objective_sequencing()`` and
        ``supports_visible_federation()`` are ``true``.*