def new(self):
        if self.read_at is not None:
            return False
        return True
validate the networks passed at the time of creating
dataset/ETHPy150Open amarandon/smeuhsocial/apps/messages/models.py/Message.new--crossover with--dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/network/base_api.py/NetworkAPI.validate_networks