SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Identifier c0
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function format (children 1)
       ExpressionList (children 3)
        Identifier CSV
        Literal \'c0 Map(Dynamic, String)\'
        Literal \' "{}" "{[\\\'a\\\', \\\'b\\\'] : \\\'a\\\', \\\'\\\'a\\\' : 1}" \'
   Set
