def get_resource_relationship_bin_assignment_session(self):
raise Unimplemented()<EOL>
Gets the session for assigning resource relationships to bin mappings.

        return: (osid.resource.ResourceRelationshipBinAssignmentSession)
                - a ``ResourceRelationshipBinAssignmentSession``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented -
                ``supports_resource_relationship_bin_assignment()`` is
                ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_resource_relationship_bin_assignment()`` is
        ``true``.*