for (int i = 0; i < fold.accuCount(); i++)
addToClosure( _closure, fold.accuStep( i ) );
unletInnerDef( fold.indexName() );
letDict().unlet( fold.eltCount() );
letInnerDef( fold.countName() );
addToClosure( _closure, fold.merge() );
unletInnerDef( fold.countName() );
letDict().unlet( fold.accuCount() );