code: def test_reload(self):
      sample = fo.Sample(filepath="video.mp4", hello="world")
      frame = fo.Frame(hi="there")
  
      sample.frames[1] = frame
  
      dataset = fo.Dataset()
      dataset.add_sample(sample)
  
      self.assertTrue(sample._in_db)
      self.assertTrue(frame._in_db)
  
      dataset.reload()
  
      self.assertTrue(sample._in_db)
      self.assertTrue(frame._in_db)
  
      self.assertEqual(sample.hello, "world")
      self.assertEqual(frame.hi, "there")
  
imports: from copy import deepcopy
  from datetime import date, datetime
  from bson import ObjectId
  import numpy
  import unittest
  import fiftyone
  import fiftyone.core.odm
  from fiftyone import ViewField
  from decorators import drop_datasets
label_desc: Use image node_id 6 for calling the VideoTests obj's underlying member method code with example usage: obj.test_reload() without return types