* Gets the directory context.
     *
     * @param envSupplier The environment supplier.
     * @return The directory context holder.
     */
    protected DirContextHolder getDirContext(final Supplier<Hashtable<String, String>> envSupplier) {
        DirContextHolder holder = contextLocal.get();
        if (holder != null) {
            holder.inc();
            return holder;
        }