Access index of Item in the displayed item list

[IchordeDionysos]

It would be great if I could get the index of the current item as I can access {{value}}, {{item}} and {{column}}.
So I would like to have something like this: {{index}}

[IchordeDionysos]

Okay well I found that there is something like index: _dataKey
So I would consider rename it to a public attribute index
Or maybe have them both