/// <summary>
    /// Adds new mass action to the underlying collection.
    /// </summary>
    /// <param name="massActionItem">Mass action to be added</param>
    /// <exception cref="ArgumentNullException"><paramref name="massActionItem"/> is null</exception>
    public void AddMassAction(MassActionItem massActionItem)
    {
        if (massActionItem == null)
        {
            throw new ArgumentNullException("massActionItem");
        }

        mMassActions.Add(massActionItem);
    }
    /// <summary>
    /// Adds new mass action to the underlying collection.
    /// </summary>
    /// <param name="massActionItem">Mass action to be added</param>
    /// <exception cref="ArgumentNullException"><paramref name="massActionItem"/> is null</exception>
    public void AddMassAction(MassActionItem massActionItem)
    {
        if (massActionItem == null)
        {
            throw new ArgumentNullException("massActionItem");
        }

        mMassActions.Add(massActionItem);
    }