protected String preDownload(String target, String version) {
        log.trace("Pre-download. target={}, version={}", target, version);
        return target;
    }
protected String preDownload(String target, String version) {
        log.trace("Pre-download. target={}, version={}", target, version);
        return target;
    }
protected String preDownload ( String target , String version ) { log . trace ( "Pre-download. target={}, version={}" , target , version ) ; return target ; }
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