public String getKeyStore() {
        return config.getJsonObject(SSL, new JsonObject()).getJsonObject(SSL_KEYSTORE, new JsonObject()).getString(SSL_PATH);
    }
@see io.apiman.gateway.engine.IEngineConfig#getGatewayInitializers(io.apiman.gateway.engine.IPluginRegistry)
gateway/platforms/vertx3/vertx3/src/main/java/io/apiman/gateway/platforms/vertx3/common/config/VertxEngineConfig.java