code: def test_get_default(self):
      self.assertEqual(self.row.get("four"), None)
      self.assertEqual(self.row.get("four", "foo"), "foo")
  
imports: import unittest
  from agate.mapped_sequence import MappedSequence
label_desc: Use image node_id 18 for calling the TestMappedSequence obj's underlying member method code with example usage: obj.test_get_default() without return types