code: def test_closed_schema(self):
      # Schema is lazy too, never computed in this case. TODO?
      self.c.close()
      assert self.c.schema is None
  
imports: import pytest
  import fiona
  from fiona.model import Geometry
label_desc: Use image node_id 20 for calling the TestReading obj's underlying member method code with example usage: obj.test_closed_schema() without return types