code: def test_get_item(self):
      self.assertEqual(self.row["one"], "a")
      self.assertEqual(self.row["two"], "b")
      self.assertEqual(self.row["three"], "c")
  
imports: import unittest
  from agate.mapped_sequence import MappedSequence
label_desc: Use image node_id 10 for calling the TestMappedSequence obj's underlying member method code with example usage: obj.test_get_item() without return types