phase property
Phase is how the last sync operation ended, in CD's own vocabulary: Running, Succeeded or Failed. It is never empty — an Application whose phase is empty has no operation at all and omits this whole object.
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? phase;