Editor: How to show "This field has multiple values" on a field not connected to the column
Editor: How to show "This field has multiple values" on a field not connected to the column

In Datatables Editor JS, lets say I have a field "Test1" which is connected to the column, and then I added another field "Test2" which references Test1's data and dynamically populates Test2's dropdown. But When Test1's data is Multiple values, how do show "This field is multiple values" which does it does by default for those fields that actually have multiple values and are connected to the columns.
Answers
Can you show me the code you are using for this please? It should be that if you are multi row editing and a field has different values across rows, the "different values" message should show regardless of how it links to another field.
Allan