def get_id_set(self):
<EOL>from .osid_errors import IllegalState<EOL>if self._kwargs['<STR_LIT>'] not in ['<STR_LIT>']:<EOL><INDENT>raise IllegalState()<EOL><DEDENT>else:<EOL><INDENT>return self._kwargs['<STR_LIT>']<EOL><DEDENT>
Gets the set of acceptable ``Ids``.

        return: (osid.id.Id) - a set of ``Ids`` or an empty array if not
                restricted
        raise:  IllegalState - syntax is not an ``ID``
        *compliance: mandatory -- This method must be implemented.*