private MutableActionSet beforeMerged = new MutableActionSet();

    public MutableActionSet getWhenMerged() {
        return whenMerged;
    }

    public void setWhenMerged(MutableActionSet whenMerged) {
        this.whenMerged = whenMerged;
    }

    public MutableActionSet getBeforeMerged() {
        return beforeMerged;
    }