private void blacklistToken(IPolicyContext context, String rawToken,
            final IAsyncResultHandler<Void> resultHandler) {
        ISharedStateComponent dataStore = getDataStore(context);
        dataStore.<Boolean> setProperty("apiman-keycloak-blacklist", rawToken, true, //$NON-NLS-1$
                resultHandler);
    }
@see io.apiman.gateway.engine.policies.AbstractMappedPolicy#doApply(io.apiman.gateway.engine.beans.ApiRequest,
     io.apiman.gateway.engine.policy.IPolicyContext, java.lang.Object,
     io.apiman.gateway.engine.policy.IPolicyChain)
plugins/keycloak-oauth-policy/src/main/java/io/apiman/plugins/keycloak_oauth_policy/KeycloakOauthPolicy.java