docs: private String getHash() {
          try {
              Node contentNode = getContextNode();
              Property data = contentNode.getProperty(Property.JCR_DATA);
              Binary bin = (Binary) data.getBinary();
              return String.format("{%s}%s", HASH_ALGORITHM, bin.getHexHash());
          } catch (RepositoryException e) {
              return "";
          }
      }