/// <summary>
/// Adds a new panel to a tab of a specified ribbon.
/// </summary>
/// <param name="userInterfaceManager">
/// The <see cref="UserInterfaceManager"/> instance that this extension method affects.</param>
/// <param name="name">The panel name.</param>
/// <param name="displayName">The panel display name.</param>
/// <param name="tabName">The tab name.</param>
/// <param name="ribbonName">The ribbon name.</param>
/// <returns>The new <see cref="RibbonPanel"/> instance.</returns>
/// <exception cref="ArgumentNullException"><paramref name="userInterfaceManager"/> is <c>null</c>.</exception>
/// <exception cref="InvalidOperationException">A panel with the specified name already exists in the specified ribbon's tab.</exception>
public static RibbonPanel AddPanel(this UserInterfaceManager userInterfaceManager, string name, string displayName, string tabName, string ribbonName)
{
return(userInterfaceManager.AddPanel(name, displayName, tabName, ribbonName, string.Empty, false));
}