serializeSpatialReference
Puts a spatial reference into a serialized format that can be used for item typeKeywords.
Note: discards "latestWkid"
In the past we used JSON.stringify, but that causes problems because
it can include commas which are interpreted by the portal update item call
as being separate typekeywords. With JSON.stringify, equality was also
dependent on the order of the properties in the spatial reference.
Check https://developers.arcgis.com/web-map-specification/objects/spatialReference/ for more details on what this object looks like.
Parameters
Returns
string
Function defined in packages/common/src/downloads/build-existing-exports-portal-query.ts:29