member.jApiClass.let { declaringClass ->
            sources.sourceFileAndSourceRootFor(declaringClass.sourceFilePath).let { (sourceFile, sourceRoot) ->
                if (declaringClass.isKotlin) ApiSourceFile.Kotlin(sourceFile, sourceRoot)
                else ApiSourceFile.Java(sourceFile, sourceRoot)
            }
        }

    private
    val JApiClass.sourceFilePath: String

    if func_id in _endpoint_context_cache:
        return _endpoint_context_cache[func_id]

    try:
        ctx: EndpointContext = {}

        if (source_file := inspect.getsourcefile(func)) is not None:
            ctx["file"] = source_file
        if (line_number := inspect.getsourcelines(func)[1]) is not None:
            ctx["line"] = line_number
        if (func_name := getattr(func, "__name__", None)) is not None: