void InspectorController::moveBranchForZoneReturn(model::ThermalZone & zone, const Handle & newPlenumHandle)
{
  model::Model model = zone.model();

  if(boost::optional<model::AirLoopHVACReturnPlenum> returnPlenum = model.getModelObject<model::AirLoopHVACReturnPlenum>(newPlenumHandle))
  {
    if( boost::optional<model::ThermalZone> plenumZone = returnPlenum->thermalZone() )
    {
      zone.setReturnPlenum(plenumZone.get());
    }
  }
  else if(boost::optional<model::ThermalZone> plenumZone = model.getModelObject<model::ThermalZone>(newPlenumHandle))
  {
    zone.setReturnPlenum(plenumZone.get());
  }
  else
  {
    zone.removeReturnPlenum();
  }

  // This updates the plenum chooser combo box
  // Need to process events first because HVAC scene needs to redraw to supply colors to combo box
  QApplication::instance()->processEvents();
  OS_ASSERT(m_inspectorView);
  m_inspectorView->update();
}