medium

.dart

  List<Widget> childerCards() {
    List<Widget> cardsMatrixWidgets = [];

    suggestionMatrix.entries.forEach((columns) {
      int iColumn = columns.key;
      List<SuggestionItem> rowsList = columns.value;
      rowsList.asMap().entries.forEach((rows) {
        ///get all widgets
        cardsMatrixWidgets.add(AnimatedPositioned.fromRect(
          duration: Duration(milliseconds: widget.stackAnimatedDuration),
          child: item(rows.value),
          rect: currentRow.rect,
        ));
      });
    });

    return cardsMatrixWidgets;
  }