Gets the index within its owning Collection<(Of <(T>)>) of the DimensionState.
The DimensionState is the DataItem
for this GuidedNavigationDimensionStateItem
Namespace:
Endeca.Web.UI.WebControlsAssembly: Endeca.Web.UI.WebControls (in Endeca.Web.UI.WebControls.dll) Version: 2.1.3.0 (2.1.3.622)