public void setDefaultList(boolean isDefault) {
        this.isDefault = isDefault;
        // Trigger event that this list has been modified
        PrivacyListManager.getInstance().dispatchModifiedEvent(this);
    }
Sets if this privacy list is the default list to apply for the user. Default
privacy lists can be overridden per session by setting an active privacy list.

@param isDefault true if this privacy list is the default list to apply for the user.
xmppserver/src/main/java/org/jivesoftware/openfire/privacy/PrivacyList.java