return null;
switch (GuiId.values()[id]) {
case EngineBronzeGUI:
return new GuiEngineBronze(player.inventory, (EngineBronze) getTileForestry(world, x, y, z));
case EngineCopperGUI:
return new GuiEngineCopper(player.inventory, (EngineCopper) getTileForestry(world, x, y, z));
case EngineTinGUI: