Igx grid - Export advanced filtering "counter" calculation methods #16950
Description
Is your feature request related to a problem? Please describe.
We created a custom button/component for opening the "advanced filtering" dialog in the igx grid.
The default "igx-grid-toolbar-advanced-filtering" shows a counter for the number of applied filters. The methods performing the counter calculation are not publicly available/exported (extractUniqueFieldNamesFromFilterTree and isFilteringExpressionsTree) so we had to reimplement/copy them.
Describe the solution you'd like
It would be great if the methods are publicly available.
