OptionalorderArray of orderByFields objects indicating the field display order for the related records and whether they should be sorted in ascending 'asc' or descending 'desc' order.
Required boolean value indicating whether to display related records. If true, client should const the user navigate to the related records. Defaults to true if the layer participates in a relationship AND the related layer/table has already been added to the map (either as an operationalLayer or as a table).
The sort in the popupInfo for the parent feature. This impacts the sorting order for the returned child records.
See https://developers.arcgis.com/web-map-specification/objects/relatedRecordsInfo/ https://developers.arcgis.com/web-scene-specification/objects/relatedRecordsInfo/.