Give ability to snap a hosted feature layer to a "map image layer" of vector data in a editable web map (or web map application)
Example - some data is published as "read only" map images layers.
I publish a read-only service of Parcel Polygons, which are vectors.
Would be great if a corresponding hosted feature layer (or view) could snap to those parcel polygons in editing map. Yes, I know I could make another hosted feature layer of parcels, but it would be great if I could recycle an existing map image layer... and therefor help my editors keep better data.