selectionHandleColor property Null safety
The color of the selection handles on the text field.
Selection handles are used to indicate the bounds of the selected text, or as a handle to drag the cursor to a new location in the text.
On iOS TextField and SelectableText cannot access selectionHandleColor. To set the selectionHandleColor on iOS, you can change the CupertinoThemeData.primaryColor in ThemeData.cupertinoOverrideTheme.
final Color? selectionHandleColor;