gos.write(hash.getBytes(Constants.UTF_8));
                }
                return SIMILAR_DOC_HASH_PREFIX + Base64.getUrlEncoder().withoutPadding().encodeToString(baos.toByteArray());
            } catch (final IOException e) {
                logger.warn("Failed to encode similar document hash: hash={}", hash, e);
            }
        }
        return hash;
    }