/**
     * Scans this location and returns all scanned resources.
     *
     * <p>This file and jar files from "Class-Path" entry in the scanned manifest files will be
     * added to {@code scannedFiles}.
     *
     * <p>A file will be scanned at most once even if specified multiple times by one or multiple
     * jar files' "Class-Path" manifest entries. Particularly, if a jar file from the "Class-Path"