How to Enforce Unique Values in a Column in Coda (Prevent Duplicates)

[Lizat]

@Highlight duplicates in a column using a conditional format

Table.Filter(Column.Contains(thisrow.Column).Count() >1

Yes, this works in principle, nonetheless it would be very handy to have a column property of ‘no duplicates’ perhaps a new feature request?
I say ‘in principle’ because I think it’s missing a final closing bracket?