Thank you for writing.
Note that RadPivotFieldList
is associated with a RadPivotGrid
. Hence, I think that save/load layout functionality for the RadPivotGrid
will be suitable for you. Thus, you will save all the existing RowGroupDescriptions
that are displayed in the RadPivotFieldList
and restore them at a later moment. Please refer to PivotGrid >> Save and Load Layout
I hope this information helps. Should you have further questions, I would be glad to help.