class_docstr: Unit test for check utils.
class_docstr_tok: ["Unit","test","for","check","utils","."]
code: def test_set(self):
      check_set({"1", "2", "3"}, {"1", "2", "3", "4"})
      with self.assertRaises(ValueError):
          check_set({"1", "2", "3"}, {"1", "2", "6", "7"})
  
imports: import unittest
  from towhee.runtime.check_utils import check_set, check_node_iter
label_desc: Use image node_id 1 for calling the TestCheckUtils obj's underlying member method code with example usage: obj.test_set() without return types