code: def test_fixed_delta_seconds(self):
      print("TestWorld.test_fixed_delta_seconds")
      world = self.client.get_world()
      settings = world.get_settings()
      self.assertFalse(settings.synchronous_mode)
      for expected_delta_seconds in [
          0.1,
          0.066667,
          0.05,
          0.033333,
          0.016667,
          0.011112,
      ]:
          settings.fixed_delta_seconds = expected_delta_seconds
          world.apply_settings(settings)
          for _ in range(0, 20):
              delta_seconds = (
                  world.wait_for_tick().timestamp.delta_seconds
              )
              self.assertAlmostEqual(
                  expected_delta_seconds, delta_seconds
              )
      settings.fixed_delta_seconds = None
      world.apply_settings(settings)
  
imports: from .None import SmokeTest
label_desc: Use image node_id 1 for calling the TestWorld obj's underlying member method code with example usage: obj.test_fixed_delta_seconds() without return types