public Parser getOutputParser() {
        return outputParser;
    }
This parser is called on the output of the process.
If the process writes to an output file, specified by
{@link ExternalParser#OUTPUT_FILE_TOKEN}, this parser will parse that file,
otherwise it will parse the UTF-8 encoded bytes from the process' STD_OUT.
@param parser
tika-core/src/main/java/org/apache/tika/parser/external2/ExternalParser.java