columnSet

    [index]

    | [index,.. |indexRange]

    | [{ condition }]

    | .all()

    | .all(Before|After|From|UpTo) ( (column) | { condition } )

    | .and (|{ columnOrSet }|)

    | (.col| .valueCol| .frameCol| .colGroup)(index)

    | (.cols| .valueCols| .frameCols| .colGroups) [ { condition } ]

    | .cols(index,.. |indexRange)

    | .colsAtAnyDepth()

    | .colsInGroups()

    | .colsOf<T> [ (kType) ] [ { condition } ]

    | .colsOfKind(kind, ..) [ { condition } ]

    | .distinct()

    | .drop(Last)(number)

    | .drop(Last)While { condition }

    | except [ { ] columnsResolver [ } ]

    | except column

    | .except(column, ..)

    | .filter { condition }

    | (.first|.last) [ { condition } ]

    | .single()

    | .name(Starts|Ends)With(text[, ignoreCase])

    | .nameContains(text[, ignoreCase] | regex)

    | .simplify()

    | .take(Last)(number)

    | .take(Last)While { condition }

    | .withoutNulls()