In order to work with the Cartographic Information Model (CIM) from ArcPy with ArcGIS Pro I am interested in view the JSON for a particular layer.
In a YouTube video:
Product Engineer, Jeff Barrette, demonstrates new and improved tools for map creation automation, to include features: advanced symbology, arcpy.mp, and the Cartographic Information Model (CIM).
At the 2:58 mark of that video, the presenter shows a JSON file for an ArcGIS Pro as background for working with the CIM.
How was such a JSON file obtained?