Disable editing of specific financial dimensions on form

[FormEventHandler(formStr(Custtable), FormEventType:Initialized)]
public static void Custtable_OnInitialized(xFormRun _sender, FormEventArgs _e)
{
    DimensionEntryControl dimControl = _sender.design().controlName(identifierStr(DimensionEntryControlTable));
    DimensionEnumeration dimensionSetId = DimensionCache:getDimensionAttributeSetForLedger();
    DimensionAttributeSetStorage dimensionAttributeSetStorage;
    DimensionAttribute dimensionAttribute;
    DimensionAttributeSetItem dimAttrSetItem;

    const str Department= 'ContosoDept';
    const str CostCenter= 'ContosoCenter';

    dimensionAttributeSetStorage = new DimensionAttributeSetStorage();

    while select dimensionAttribute
        where dimensionAttribute.Name != Department
            && dimensionAttribute.Name != CostCenter
        join dimAttrSetItem
            where dimAttrSetItem.DimensionAttribute == dimensionAttribute.RecId
                && dimAttrSetItem.DimensionAttributeSet == dimensionSetId
    {
        dimensionAttributeSetStorage.addItem(
            dimensionAttribute.RecId,
            dimensionAttribute.HashKey,
            NoYes::Yes);
    }

    dimControl.parmEditableDimensionSet(dimensionAttributeSetStorage.save());
}