public void setFlattenNestedGroups(boolean flattenNestedGroups) {
        this.flattenNestedGroups = flattenNestedGroups;
        properties.put("ldap.flattenNestedGroups", String.valueOf(posixMode));
    }
Set whether nested / complex / hierarchic groups should be should be flattened.

@see #isFlattenNestedGroups()
xmppserver/src/main/java/org/jivesoftware/openfire/ldap/LdapManager.java