CreateQuery null_dict (children 3)
 Identifier null_dict
 ExpressionList (children 4)
  DictionaryAttributeDeclaration id (children 1)
   DataType UInt64
  DictionaryAttributeDeclaration val (children 1)
   DataType UInt8
  DictionaryAttributeDeclaration default_val (children 2)
   DataType UInt8
   Literal UInt64_123
  DictionaryAttributeDeclaration nullable_val (children 1)
   DataType Nullable (children 1)
    ExpressionList (children 1)
     DataType UInt8
 Dictionary definition (children 4)
  ExpressionList (children 1)
   Identifier id
  FunctionWithKeyValueArguments  null (children 1)
   ExpressionList
  Dictionary lifetime
  Dictionary layout (children 1)
   ExpressionList