A new interdependent builder has been added to construct a more efficient, complex GroupedListView where the current element is dependent on its neighboring elements.

Dart SDK increased from version 2.12 to 2.17 due to new functionalities only available for the new version.

The chat example app has been upgraded to include a more realistic implementation of a chat timeline, utilizing the new interdependent builder. Additionally, an infinite timeline feature was added to test the performance of the new method.

I added a test case to verify that the previous, current, and next elements are delivered in the expected order, in various list sizes and sort orders.

Changed requested

Changed realized to reduce the number of operation inside _buildItem method

Commentary updated