Is CIMPictureGraphic.PictureURL accepting a base64 string of an image on ArcGIS Pro 2.9 or is it only supported in ArcGIS Pro 3 onwards only ?
on 3.1: https://pro.arcgis.com/en/pro-app/latest/sdk/api-reference/topic4030.html
on 2.9 : https://pro.arcgis.com/en/pro-app/2.9/sdk/api-reference/index.html#topic4030.html
on 2.9 it's not well documented and it doesn't seem to work. I could not test it yet on 3.1.
