code: def test_scalar_default_is_overridable(self):
      rows = records.RecordCollection(iter([]))
      assert rows.scalar("Kaffe") == "Kaffe"
  
imports: from collections import namedtuple
  import records
  from pytest import raises
label_desc: Use image node_id 20 for calling the TestRecordCollection obj's underlying member method code with example usage: obj.test_scalar_default_is_overridable() without return types