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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def destroy_sns_event(app_name, env, region):
 """ Destroy all Lambda SNS subscriptions. Args: app_name (str):
 name of the lambda function env (str):
 Environment/Account for lambda function region (str):
 AWS region of the lambda function Returns: boolean: True if subscription destroyed successfully """

    session = boto3.Session(profile_name=env, region_name=region)
    sns_client = session.client('sns')

    lambda_subscriptions = get_sns_subscriptions(app_name=app_name, env=env, region=region)

    for subscription_arn in lambda_subscriptions:
        sns_client.unsubscribe(SubscriptionArn=subscription_arn)

    LOG.debug("Lambda SNS event deleted")
    return True