@Override
 public void initGui() {
   super.initGui();
   buttonList.add(
       new GuiButton(
           1,
           guiLeft + 7,
           guiTop + 49,
           140,
           20,
           EnhancedPortals.localize("gui." + (fluid.isSending ? "sending" : "receiving"))));
   addElement(new ElementFluid(this, xSize - 25, 7, fluid.tank));
 }
 @Override
 public void updateScreen() {
   super.updateScreen();
   ((GuiButton) buttonList.get(0)).displayString =
       EnhancedPortals.localize("gui." + (fluid.isSending ? "sending" : "receiving"));
 }