}
            log.trace("Unregistered resource: {} ({})", resourceId, holder.resourceType);
        }
    }

    /**
     * Check for and report resource leaks
     */
    public void checkForLeaks() {
        if (!leakDetectionEnabled) {
            return;
        }

        // Process phantom references to detect leaks
        Reference<?> ref;
        while ((ref = referenceQueue.poll()) != null) {