Getting the current number of stamp source

This code is for seting clone source:

var idsetd = charIDToTypeID( "setd" );
    var desc98 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref9 = new ActionReference();
        var idPrpr = charIDToTypeID( "Prpr" );
        var idClnS = charIDToTypeID( "ClnS" );
        ref9.putProperty( idPrpr, idClnS );
        var idcapp = charIDToTypeID( "capp" );
        var idOrdn = charIDToTypeID( "Ordn" );
        var idTrgt = charIDToTypeID( "Trgt" );
        ref9.putEnumerated( idcapp, idOrdn, idTrgt );
    desc98.putReference( idnull, ref9 );
    var idT = charIDToTypeID( "T   " );
        var desc99 = new ActionDescriptor();
        var idSrce = charIDToTypeID( "Srce" );
            var ref10 = new ActionReference();
            var idLyr = charIDToTypeID( "Lyr " );
            var idBckg = charIDToTypeID( "Bckg" );
            ref10.putProperty( idLyr, idBckg );
        desc99.putReference( idSrce, ref10 );
        var idPstn = charIDToTypeID( "Pstn" );
            var desc100 = new ActionDescriptor();
            var idHrzn = charIDToTypeID( "Hrzn" );
            var idPxl = charIDToTypeID( "#Pxl" );
            desc100.putUnitDouble( idHrzn, idPxl, 1443.000000 );
            var idVrtc = charIDToTypeID( "Vrtc" );
            var idPxl = charIDToTypeID( "#Pxl" );
            desc100.putUnitDouble( idVrtc, idPxl, 668.000000 );
        var idPnt = charIDToTypeID( "Pnt " );
        desc99.putObject( idPstn, idPnt, desc100 );
    var idImgP = charIDToTypeID( "ImgP" );
    desc98.putObject( idT, idImgP, desc99 );
executeAction( idsetd, desc98, DialogModes.NO );

As you can see... data should be stored in application class inside clonesource property. (rows 5-11)

But if you try to read this property:

function getCloneSource () { 
     var cloneID = charIDToTypeID("ClnS");
     var ref = new ActionReference();
     ref.putProperty(stringIDToTypeID('property'), cloneID );
     ref.putEnumerated(stringIDToTypeID('application'), stringIDToTypeID('ordinal'), stringIDToTypeID('targetEnum'));
     return executeActionGet(ref);
}

It simply fails, but same code works for different properties. E.g. "currentToolOptions"

So this data are probably write-only. Just try put e.g. stringIDToTypeID("cachePrefs"); instead charIDToTypeID("ClnS"); And it should pass.

You can only read active tool type and probably all brush settings. But not data from Clone Source panel.