SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function initializeAggregation (children 1)
     ExpressionList (children 4)
      Literal \'sumMap\'
      Literal Array_[UInt64_1, UInt64_2, UInt64_1]
      Literal Array_[UInt64_1, UInt64_1, UInt64_1]
      Literal Array_[Int64_-1, UInt64_10, UInt64_10]