Handle(HYDROData_Region) aNewRegion = addNewRegion( aDocument, CALCULATION_REGIONS_PREF );
if ( aNewRegion.IsNull() )
return aNewRegion;
Handle(HYDROData_Region) aNewRegion = addNewRegion( aDocument, CALCULATION_REGIONS_PREF );
if ( aNewRegion.IsNull() )
return aNewRegion;