Currently, tools like the Qt Creator code model, qmllint, and qmlsc cannot correctly analyze ApplicationInterface and StartupTimer because they are injected using QQmlContext::setContextProperty().

Suggestions

• (Short-term) Converting this to qmlRegisterSingletonType() or qmlRegisterSingletonInstance() will make these singletons visible to Qt Creator's current code model (but not to other QML tooling)
• (Long-term) Converting this to QML_SINGLETON will make these singletons visible to all current QML tooling

Notes
Context properties are injected in the following files:

• src/common-lib/qml-utilities.cpp (dummy data)
• src/main-lib/main.cpp (StartupTimer)
• src/manager-lib/qmlinprocessruntime.cpp (ApplicationInterface)
• src/tools/appman/appman.cpp (build config)
• src/tools/launcher-qml/launcher-qml.cpp (StartupTimer + ApplicationInterface)