private String controlFlag(LoginModuleControlFlag loginModuleControlFlag) {
        // LoginModuleControlFlag.toString() has format "LoginModuleControlFlag: flag"
        String[] tokens = loginModuleControlFlag.toString().split(" ");
        return tokens[tokens.length - 1];
    }
Tests parsing of {@link SaslConfigs#SASL_JAAS_CONFIG} property and verifies that the format
and parsing are consistent with JAAS configuration files loaded by the JRE.
clients/src/test/java/org/apache/kafka/common/security/JaasContextTest.java