AppFlowy/frontend/app_flowy/packages/flowy_editor/lib/service/service.dart

import 'package:flowy_editor/service/selection_service.dart';
import 'package:flutter/material.dart';

class FlowyService {
  // selection service
  final selectionServiceKey = GlobalKey(debugLabel: 'flowy_selection_service');
  FlowySelectionService get selectionService {
    assert(selectionServiceKey.currentState != null &&
        selectionServiceKey.currentState is FlowySelectionService);
    return selectionServiceKey.currentState! as FlowySelectionService;
  }

  // keyboard service
  final keyboardServiceKey = GlobalKey(debugLabel: 'flowy_keyboard_service');
}