code: def test_empty(self):
      rows = [
          (None,),
          (None,),
          (None,),
      ]
  
      inferred = self.tester.run(rows, ["one"])
  
      # This behavior is not necessarily desirable. See https://github.com/wireservice/agate/issues/371
      self.assertIsInstance(inferred[0], Boolean)
  
imports: import unittest
  from agate.data_types import Boolean, Date, DateTime, Number, Text, TimeDelta
  from agate.type_tester import TypeTester
label_desc: Use image node_id 2 for calling the TestTypeTester obj's underlying member method code with example usage: obj.test_empty() without return types