Null check operator used on a null value

sooxie / list_treeview

A treeview for Flutter. Based on the listview.

MIT License

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Null check operator used on a null value #12

Open dipen-apptrait opened 2 years ago

dipen-apptrait commented 2 years ago

when I dispose the controller & reset it with data. after that, I m using the parentOfItem() method to get parent data but it returns a Null check operator used on a null value.