PlatformGap
@Target(allowedTargets = [AnnotationTarget.CLASS, AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY, AnnotationTarget.CONSTRUCTOR] )
Marks a common API whose platform binding is missing or degraded on the listed platforms.
The API exists in commonMain so shared code compiles everywhere, but the platform actual cannot reach the underlying engine feature — e.g. WebGL or single-threaded wasm lacks it, or the Android SDK doesn't expose it. behavior states exactly what the call does there: throws UnsupportedOperationException, is a silent no-op, or returns a placeholder.
The full per-platform coverage table lives in Platform Notes.