createState method
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:
@override
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.
Implementation
@override
State<StatefulWidget> createState() => new AutoCompleteTextFieldState<T>(
suggestions,
textChanged,
textSubmitted,
onFocusChanged,
itemSubmitted,
itemBuilder,
itemSorter,
itemFilter,
suggestionsAmount,
submitOnSuggestionTap,
clearOnSubmit,
minLength,
inputFormatters,
textCapitalization,
decoration,
style,
keyboardType,
textInputAction,
controller,
focusNode);