SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier x
        Function arrayJoin (children 1)
         ExpressionList (children 1)
          Identifier x
      Literal Array_[Array_[UInt64_1, UInt64_2, UInt64_3]]
