swift - How to add custom data to overlay in Google Maps for iOS? -

how can add custom data gmsgroundoverlay images in google maps ios? passing data on markers when clicked built-in "marker.userdata" ground overlays dont have property?

okay figured out if it's helpful else. not sure if best way this, works.

1.) extended gmsgroundoverlay class in map's main .swift file

extension gmsgroundoverlay {      private struct customdata {          static var userdata:any? = nil      }      var userdata:any? {          {              return customdata.userdata          }          set {              customdata.userdata = newvalue          }      }  }

2.) pass data on overlay before overlays added map

let overlaydata:[string:any] = ["id":id,"html":html,"picture":picture,"photos":photos]  overlay.userdata = overlaydata

3.) receive data when overlays clicked

func mapview(_ mapview: gmsmapview, didtapoverlay overlay: gmsgroundoverlay)  -> bool {          print("# tapped overlay data: ")          (key,value) in overlay.userdata as! [string:any] {              print("#    \(key) = \(value)")          }          return false      }