id

Canonical Highway model element ID, i.e. MetamodelEntity.id for the context viewpoint element. For a top-level Kotlin declaration such as val fusion = Fusion(), this is the dot-separated package plus reference name, for example app.activities.example_activity.context.fusion.

This is the stable model identity used for diagram element IDs and model consistency checks. It is intentionally separate from implementationClassName, which names the upstream/native implementation type.