Dropdown Button 

A representation of Menu.
NikuDropDownButton accepts all the props as same as DropDownButton.
dart
// Using namespace
n.DropDownButton<T>(state);
// Using Niku Prefix
NikuDismissible<T>(state);Example Usage 
dart
final options = ["Mountain", "Ocean", "Star"];
n.DropdownButton<String>(option.value)
    ..itemsValue = options
    ..onChanged = updateNewValue;