I'm trying to sort my dynamic columns in a cross tab according to some custom scheme.
In the docs I found mention of comparatorExpression: Crosstab group bucket comparator expression. The result of this expression is used to sort the buckets, in ascending or descending order. If no comparator expression is specified, the natural order will be used.
but I don't understand what the expression should look like. Can I somehow use a regular java comparator? Can someone share an example?