protected static Map<String, String> getMappings(String joystickName, boolean create) {
        Map<String, String> result = joystickMappings.get(joystickName.trim());
        if (result == null && create) {
            result = new HashMap<String, String>();
            joystickMappings.put(joystickName.trim(), result);
        }
        return result;
    }
A private constructor to inhibit instantiation of this class.
jme3-core/src/main/java/com/jme3/input/JoystickCompatibilityMappings.java