Is it possible to track changes in source order of map keys?

[nullrocket]

I'm pretty sure it isn't implemented as is, how feasible is it to add though? I would hope to see a moved list of some kind, I know order of map keys isn't a requirement of json itself, but dart does use an ordered hashmap for its representation of json so its possible. I'm implementing an undo mechanism using diff and it would be helpful to not have the maps items in a different order on reverting.

{
  "a":"value",
  "b": "value"
}


{
"b":"value"
"a":"value"
}

[dJani97]

There is a moved property in the DiffNode object:

a moved property, which is a Map of indexes, where key is the original index of an element, and value is index in the changed list.

Seems to be quite similar to what you are requesting.