CustomArgumentType does not utilize parse(reader, source)

[TheFruxz]

Expected behavior

If using CustomArgumentType<T, N> and also overriding the parse(reader, source) function, it should default to it instead of using the less advanced parse(reader) function.
This should make it possible to access the source and adapt the parsed content to it.

Observed/Actual behavior

Override the parse(reader, source) function does effectively nothing. There is no way to parse based on source/context, and it always only uses the parse(reader) function instead.
In code documentation (and the online Paper Docs) there is no word about this behavior, or how to deal with it, of the CustomArgumentType, so it looks like it is just not working as intended / thought.

Steps/models to reproduce

• Implement CustomArgumentType<*, *>
• Override parse(reader, source) as well
• Try to use it

Plugin and Datapack List

/

Paper version

This server is running Paper version 1.21.4-177-main@e5a8ee8 (2025-02-21T11:12:22Z) (Implementing API version 1.21.4-R0.1-SNAPSHOT)
You are running the latest version
Previous version: 1.21.4-175-ab984a0 (MC: 1.21.4)

Other

My class, rewritten for only the necessary parts

@Suppress("UnstableApiUsage")
object DemoArgumentType : CustomArgumentType<String, String> {

    override fun parse(reader: StringReader): String {
        return "wrong"
    }

    override fun <S : Any> parse(reader: StringReader, source: S): String {
        return "right"
    }

    override fun getNativeType(): StringArgumentType =
        StringArgumentType.word()

    override fun <S : Any> listSuggestions(
        context: CommandContext<S>,
        builder: SuggestionsBuilder
    ) = CompletableFuture.supplyAsync {
        builder.suggest("wrong").suggest("right").build()
    }

}