This class contains the panel definition for the ribbon tab. It contains the collection of panel references.

Autodesk.AutoCAD.Customization.ElementBase
    Autodesk.AutoCAD.Customization.VersionableElement
        Autodesk.AutoCAD.Customization.CustomizationElement
            Autodesk.AutoCAD.Customization.RibbonItem
            Autodesk.AutoCAD.Customization.ICustomizationContainer
                Autodesk.AutoCAD.Customization.RibbonTabSource

Public Class RibbonTabSource
Inherits RibbonItem
Inherits ICustomizationContainer

public class RibbonTabSource : RibbonItem, ICustomizationContainer;