source_ property
Source is the git coordinate the run rendered. It is this deployment's own configuration echoed back, never a request parameter, and it is reported so a reader of the answer knows WHICH tree the revision names.
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
ReconcileSource? source_;