"getProperty" method on UserGroupCallbackManager class for jBPM 5 returns null

Issue

The getProperty method on UserGroupCallbackManager class always returns null for every property:

    public String getProperty(String name) {
        if (this.callbackproperties != null) {
        this.callbackproperties.getProperty(name);
        }

        return null;
    }

• Is this a bug ?
• Is there a fix to this issue ?