@Override
    protected boolean isAllowed(ConfigValue configValue) {
        return ALLOWED_CONFIG.contains(configValue.name());
    }
Allows all {@code sasl} configurations to be overridden via the connector configs by setting {@code connector.client.config.override.policy} to
{@code Principal}. This allows to set a principal per connector.
connect/runtime/src/main/java/org/apache/kafka/connect/connector/policy/PrincipalConnectorClientConfigOverridePolicy.java