You could do something like this:
// Common module
expect annotation class PlatformName(val name: String)
class PrettyPrinter {
@PlatformName("jsonToString")
fun jsonToString...
}
// JS module
actual typealias PlatformName = JsName
// JVM module
// Either create some dummy annotation, or alias to JvmName
This way PlatformName will be transformed to JsName when compiling to JS.
Overall using platform-specific annotations in common code is a bit of a pain. Most likely there will be some simple solution when MPP is released (it is experimental at the moment).