public String getDigest() {
        return digest;
    }
digest configuration string, e.g. md5 or sha256, alternately w 16 or 32 encoding,
e.g. md5:32,sha256:16 would result in two digests per file

@return
tika-server/tika-server-core/src/main/java/org/apache/tika/server/core/TikaServerConfig.java