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There are a lot of parallels between the Column(s) Selection DSL and Row(Value)Expressions as both allow you to reference columns. The difference being that referencing a column on a DataRow produces a value as in the Column(s) Selection DSL it produces a column.
Still, it's worth revisiting DataRow.kt keeping in mind the parallels with the improved Columns Selection DSL (after that's done).
One thing that comes to mind is being able to call "column"() without a type to reference an Any? column and the "easy"["creation"]["of"]["columnPaths"].get<T>("withSingleColumnAccess").