code: def test_persona_not_startswith(self):
      self.adapter.create(text="Hello!", persona="bot:tester")
      self.adapter.create(text="Hi everyone!", persona="user:person")
  
      results = list(self.adapter.filter(persona_not_startswith="bot:"))
  
      self.assertEqual(len(results), 1)
      self.assertEqual(results[0].text, "Hi everyone!")
  
imports: from django.test import TestCase
  from chatterbot.storage import DjangoStorageAdapter
  from chatterbot.conversation import Statement
  from chatterbot.ext.django_chatterbot.models import Statement
label_desc: Use image node_id 13 for calling the DjangoAdapterFilterTests obj's underlying member method code with example usage: obj.test_persona_not_startswith() without return types