code: boolean skipUnlockedNavtitle(final Element metadataContainer, final Element checkForNavtitle) {
          if (!TOPIC_TITLEALTS.matches(metadataContainer) ||
                  !TOPIC_NAVTITLE.matches(checkForNavtitle)) {
              return false;
          } else if (checkForNavtitle.getAttributeNodeNS(DITA_OT_NS, ATTRIBUTE_NAME_LOCKTITLE) == null) {
              return false;
          } else if (ATTRIBUTE_NAME_LOCKTITLE_VALUE_YES.matches(checkForNavtitle.getAttributeNodeNS(DITA_OT_NS, ATTRIBUTE_NAME_LOCKTITLE).getValue())) {
              return false;
          }
          return true;
      }
docs: Check if an element is an unlocked navtitle, which should not be pushed into topics.
  
  @param metadataContainer container element
  @param checkForNavtitle title element