def type_is_enveloped(self):
        if _lib.PKCS7_type_is_enveloped(self._pkcs7):
            return True
        return False
``compute_instance_id`` raises an error when it cannot return a valid
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/pyopenssl/OpenSSL/crypto.py/PKCS7.type_is_enveloped--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/test/test_blockdevice.py/LoopbackBlockDeviceAPIImplementationTests.test_missing_instance_id