def safeUpdate(dest, origin):
    
    for key in origin:
        if not key in dest:
            dest[key] = origin[dest]
Returns expected names from '{cert,csr}-idnsans.pem'.
dataset/ETHPy150Open zynga/jasy/jasy/js/api/Writer.py/safeUpdate--crossover with--dataset/ETHPy150Open letsencrypt/letsencrypt/acme/acme/crypto_util_test.py/PyOpenSSLCertOrReqSANTest._get_idn_names