TextSelectionDelegate.copySelection
TextSelectionDelegate.cutSelection
TextSelectionDelegate.pasteText
TextSelectionDelegate.selectAll
Try to either
provide an implementation,
inherit an implementation from a superclass or mixin,
mark the class as abstract, or
provide a 'noSuchMethod' implementation.
class InternalSelectableMathState extends State
^^^^^^^^^^^^^^^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/services/text_input.dart:948:8: Context: 'TextSelectionDelegate.copySelection' is defined here.
void copySelection(SelectionChangedCause cause) {
^^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/services/text_input.dart:872:8: Context: 'TextSelectionDelegate.cutSelection' is defined here.
void cutSelection(SelectionChangedCause cause) {
^^^^^^^^^^^^
../../flutter/packages/flutter/lib/src/services/text_input.dart:900:16: Context: 'TextSelectionDelegate.pasteText' is defined here.
Future pasteText(SelectionChangedCause cause) async {
^^^^^^^^^
../../flutter/packages/flutter/lib/src/services/text_input.dart:928:8: Context: 'TextSelectionDelegate.selectAll' is defined here.
void selectAll(SelectionChangedCause cause) {
^^^^^^^^^```