code: def test_tab_iterable():
      tab = Tab()
      assert_true(isinstance(tab, Iterable))
  
imports: from typing import Iterable
  from unittest.mock import patch
  from nose.tools import assert_equal, assert_in, assert_true
  from pyecharts import options
  from pyecharts.charts import Bar, Line, Tab
  from pyecharts.commons.utils import OrderedSet
  from pyecharts.components import Table
  from pyecharts.faker import Faker
  from pyecharts.globals import ThemeType
label_desc: Use image node_id 9 for calling a global function with example usage: test_tab_iterable() without return types