basemapGalleryGroupQuery property
A query that identifies the group that contains the basemaps of the portal's basemap gallery.
This gallery group is defined by the portal's administrator and contains the basemaps that are displayed in the Map Viewer basemap gallery if a user logs in with an ArcGIS Online or ArcGIS Enterprise account. This group query is intended for use when the value of PortalInfo.useVectorBasemaps is false. To explore the basemap gallery PortalGroup, create a PortalQueryParameters using this query string, and call Portal.findGroups.
Portal.basemaps uses this string to return a collection of basemaps from the portal's basemap gallery.