public Ptg get3DReferencePtg(AreaReference areaRef, SheetIdentifier sheet) {int extIx = getSheetExtIx(sheet);return new Area3DPtg(areaRef, extIx);}

public Ptg get3DReferencePtg ( AreaReference areaRef , SheetIdentifier sheet ) { int extIx = getSheetExtIx ( sheet ) ; return new Area3DPtg ( areaRef , extIx ) ; }
public Ptg Get3DReferencePtg(CellReference cr, SheetIdentifier sheet){int extIx = GetSheetExtIx(sheet);return new Ref3DPtg(cr, extIx);}
