Column subquery helpers about sql-kit HOT 3 CLOSED

let rows = try conn.select()
    .all()
    .column(subquery: {
        $0.select()
            .column(\Planet.id).from(Planet.self)
            .limit(1)
    }, as: .identifier("firstPlanetID"))
    .from(Galaxy.self)
    .all().wait()

let rows = try conn.select()
    .all()
    .column(subquery: { $0.raw("SELECT 1 + 1") }, as: .identifier("two"))
    .from(Galaxy.self)
    .all().wait()

public func column<B>(
    subquery closure: (Connection) -> (B),
    as alias: Connection.Query.Select.SelectExpression.Identifier? = nil
) -> Self
    where B: SQLQueryBuilder, B.Connection.Query == Connection.Query.Select.SelectExpression.Expression.Subquery

let rows = try conn.select()
    .all()
    .column { $0.raw("SELECT 1 + 1") }
    .from(Galaxy.self)
    .all().wait()