Avail Physical in Ax 2012 using caching class

static void Job6(Args _args)
{
InventAvailabilityFormCache cache;
InventDim inventDim;
;

inventDim.inventSiteId = ‘1’;
inventDim.InventLocationId = ’11’;
inventDim = inventDim::findOrCreate(inventDim);
cache = InventAvailabilityFormCache::construct();

print cache.availabilityByItemId(‘1000’,inventDim).availPhysical();
pause;
}