code: @Override
      public Instant getCreatedDate() {
          try {
              if (hasProperty(FEDORA_CREATED)) {
                  return ofEpochMilli(getTimestamp(FEDORA_CREATED, NO_TIME));
              }
              if (hasProperty(JCR_CREATED)) {
                  return ofEpochMilli(getTimestamp(JCR_CREATED, NO_TIME));
              }
          } catch (final PathNotFoundException e) {
              throw new PathNotFoundRuntimeException(e);
          } catch (final RepositoryException e) {
              throw new RepositoryRuntimeException(e);
          }
          LOGGER.debug("Node {} does not have a createdDate", node);
          return null;
      }
docs: /* (non-Javadoc)
  @see org.fcrepo.kernel.api.models.FedoraResource#getCreatedDate()