'"subscriptions": [
"Owner": "020202020202",
"Endpoint": "someemail@example.com",
"Protocol": "email",
"TopicArn": "arn:aws:sns:us-east-1:020202020202:somesnstopic",
"SubscriptionArn": "arn:aws:sns:us-east-1:020202020202:somesnstopic:..."'

def check_subscriptions_crossaccount(self, snsitem):

    subscriptions = snsitem.config.get('subscriptions', [])
    for subscription in subscriptions:
        source = '{0}    subscription    to    {1}'.format(subscription.get('Protocol', None), subscription.get('Endpoint', None))
        owner = subscription.get('Owner', None)
        self._check_cross_account(owner, snsitem, source)
