Avoid leaking instances from snippets. (#7800)
Avoid leaking instances from snippets. (#7800)



GoogleCloudPlatform/gcloud-python,tseaver/google-cloud-python,tseaver/google-cloud-python,tseaver/google-cloud-python,tswast/google-cloud-python,GoogleCloudPlatform/gcloud-python,googleapis/google-cloud-python,tswast/google-cloud-python,tswast/google-cloud-python,googleapis/google-cloud-python