;
    case _kIncreaseIndex:
      return &#39;SemanticsAction.increase&#39;;
    case _kDecreaseIndex:
      return &#39;SemanticsAction.decrease&#39;;
    case _kShowOnScreenIndex:
      return &#39;SemanticsAction.showOnScreen&#39;;
    case _kMoveCursorForwardByCharacterIndex:
      return &#39;SemanticsAction.moveCursorForwardByCharacter&#39;;
    case _kMoveCursorBackwardByCharacterIndex:
      return &#39;SemanticsAction.moveCursorBackwardByCharacter&#39;;
    case _kSetSelectionIndex:
      return &#