How to find angle of last transformation?

var idTrnf = charIDToTypeID( "Trnf" );

    var desc57 = new ActionDescriptor();

    var idnull = charIDToTypeID( "null" );

        var ref39 = new ActionReference();

        var idLyr = charIDToTypeID( "Lyr " );

        var idOrdn = charIDToTypeID( "Ordn" );

        var idTrgt = charIDToTypeID( "Trgt" );

        ref39.putEnumerated( idLyr, idOrdn, idTrgt );

    desc57.putReference( idnull, ref39 );

    var idLstT = charIDToTypeID( "LstT" );

    desc57.putBoolean( idLstT, true );

var lastTransformation = executeAction( idTrnf, desc57, DialogModes.NO );
but here i want angle?