private boolean resourceExists(String path) {
        if (resourceExistsSet.contains(path)) {
            return true;
        }
        if (Files.exists(resourceRoot.resolve(path))) {
            resourceExistsSet.add(path);
            return true;
        } else {
            return false;
        }
    }
@author Marc Savy {@literal <marc@blackparrotlabs.io>}
portal/war/wildfly/src/main/java/io/apiman/portal/SplitterFilter.java