code: def test_iter(self):
      tableset = TableSet(self.tables.values(), self.tables.keys())
  
      for i, table in enumerate(tableset):
          self.assertEqual(table, list(self.tables.values())[i])
  
imports: import json
  import shutil
  from collections import OrderedDict
  from io import StringIO
  from agate import Table, TableSet
  from agate.computations import Formula
  from agate.data_types import Number, Text
  from agate.testcase import AgateTestCase
label_desc: Use image node_id 5 for calling the TestTableSet obj's underlying member method code with example usage: obj.test_iter() without return types