How to implement a second row type for sub rows?

[varwasabi]

I'm using the expanded rows functionality but on the expanded rows i have a differing data set.

Using the same cell method in the columnDefs sticks to the first type but i need a way for it to reference the subRow type. i.e. when in the cell if row.depth is 1 then everything on row would need to reference the second type otherwise it would work as is out of the box.

[Doesntmeananything]

I have a similar use case. In my table, I'd like to have parent rows to be a simple label with a button to toggle expanded state. Ideally, these would be a different type compared to children rows.

For now, I work around this by making the parent rows the same type as the children rows, however that leads to a number of type issues as the table grows in complexity.

Essentially, I'm looking for a way to define the inverse of sub-components (as shown here), where the parent row is a separate type that is still defined within the table data model.