add_demo("Button", new ButtonDemo);
add_demo("Dropdown", new DropdownDemo);
add_demo("Entry", new EntryDemo);
add_demo("Toggle", new ToggleDemo);
add_demo("Button", new ButtonDemo);
add_demo("Dropdown", new DropdownDemo);
add_demo("Entry", new EntryDemo);
add_demo("Toggle", new ToggleDemo);