public Set<String> getLangs() {
        return langs;
    }
Starts a thread that reads the contents of the standard output or error
stream of the given process to not block the process. The stream is closed
once fully processed.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-ocr-module/src/main/java/org/apache/tika/parser/ocr/TesseractOCRParser.java