Giving a key for identification when using multiple ParentChildCheckbox

Hi, Abhishek Sir,

I am very inspired by you for all your contributions in Flutter. I am also a Flutter Enthusiast.

This issue is that each ParentChildCheckBox should have a key for its identification. Like instead of passing the selected children as a list we can pass the key to get a reference to the particular ParentChildCheckBox.

ParentChildCheckBox(
key:'1',
) ,
ParentChildCheckBox(
key:'2',
).

Something like ParentChildCheckBox.key('1') to refer to the first ParentChildCheckbox().

I hope you understood. Correct me if I am wrong anywhere.
Thank you.