url property
URL is the document's link back into the app it was ingested from. Absent when the indexed payload carries none, which is the normal case for pages and memories.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? url;