code: public Content getTagletOutput(Tag tag, TagletWriter tagletWriter) {
          if (! (tag.holder() instanceof ProgramElementDoc)) {
              return tagletWriter.getOutputInstance();
          }
          return tag.name().equals("@inheritDoc") ?
                  retrieveInheritedDocumentation(tagletWriter, (ProgramElementDoc) tag.holder(), null, tagletWriter.isFirstSentence) :
                  retrieveInheritedDocumentation(tagletWriter, (ProgramElementDoc) tag.holder(), tag, tagletWriter.isFirstSentence);
      }
docs: Given the <code>Tag</code> representation of this custom
  tag, return its string representation, which is output
  to the generated page.
  @param tag the <code>Tag</code> representation of this custom tag.
  @param tagletWriter the taglet writer for output.
  @return the Content representation of this <code>Tag</code>.