createState method Null safety

  1. @override
CreditCardInputViewState createState()

Creates the mutable state for this widget at a given location in the tree.

Subclasses should override this method to return a newly created instance of their associated State subclass:

State<SomeWidget> createState() => _SomeWidgetState();

The framework can call this method multiple times over the lifetime of a StatefulWidget. For example, if the widget is inserted into the tree in multiple locations, the framework will create a separate State object for each location. Similarly, if the widget is removed from the tree and later inserted into the tree again, the framework will call createState again to create a fresh State object, simplifying the lifecycle of State objects.


CreditCardInputViewState createState() {
  return CreditCardInputViewState(
      helperNeeded: _helperNeeded,
      inputNumberDecoration: _inputNumberDecoration,
      inputExpMmDecoration: _inputExpMmDecoration,
      inputExpYyDecoration: _inputExpYyDecoration,
      inputCvvDecoration: _inputCvvDecoration,
      inputDecoration: _inputDecoration);