code: public boolean addPreserveTag(final String tagName) {
  
          Vector<Attribute> attributeList = new Vector<Attribute>(1);
          Attribute tagNameAttribute = new Attribute();
          tagNameAttribute.setName(tagName.toLowerCase());
          attributeList.add(tagNameAttribute);
          Tag keepTag = m_nodeFactory.createTagNode(null, 0, 0, attributeList);
          boolean result = m_nodeFactory.addTagPreserve(keepTag);
          return result;
      }
docs: Adds a tag that will be preserved by <code>{@link #stripHtml(String)}</code>.<p>
  
  @param tagName the name of the tag to keep (case insensitive)
  
  @return true if the tagName was added correctly to the internal engine