/// <summary>
/// Initializes a new instance of the <see cref="ToolBarCheckBoxViewModel"/> class.
/// </summary>
/// <param name="commandItem">The command item. Must not be <see langword="null"/>.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="commandItem"/> is <see langword="null"/>.
/// </exception>
public ToolBarCheckBoxViewModel(CommandItem commandItem) : base(commandItem)
{
Debug.Assert(commandItem.IsCheckable, "ToolBarCheckBoxViewModel should be used with checkable command items.");
}
/// <summary>
/// Initializes a new instance of the <see cref="ToolBarButtonViewModel"/> class.
/// </summary>
/// <param name="commandItem">The command item. Must not be <see langword="null"/>.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="commandItem"/> is <see langword="null"/>.
/// </exception>
public ToolBarButtonViewModel(CommandItem commandItem) : base(commandItem)
{
Debug.Assert(!commandItem.IsCheckable, "ToolBarButtonViewModel should not be used with checkable command items.");
}