def get_group_hierarchy_session_for_bin(self, bin_id=None):
if bin_id is None:<EOL><INDENT>raise NullArgument<EOL><DEDENT>raise Unimplemented()<EOL>
Gets a group hierarchy session for the given bin.

        arg:    bin_id (osid.id.Id): the ``Id`` of the bin
        return: (osid.resource.GroupHierarchySession) - a
                ``GroupHierarchySession``
        raise:  NotFound - ``bin_id`` not found
        raise:  NullArgument - ``bin_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_group_hierarchy()`` or
                ``supports_visible_federation()`` is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_group_hierarchy()`` and
        ``supports_visible_federation()`` are ``true``.*