presto-main/src/main/java/io/prestosql/server/security/KerberosConfig.java/KerberosConfig/setKeytab
class KerberosConfig:    @Config(HTTP_SERVER_AUTHENTICATION_KRB5_KEYTAB)
    @LegacyConfig("http.server.authentication.krb5.keytab")
    public KerberosConfig setKeytab(File keytab)
    {
        this.keytab = keytab;
        return this;
    }