code: @Override
      public String toHtmlString() {
          final OutputBuffer outputBuffer = outputBufferTL.get();
          if (!preserveOutputBufferContent) {
              outputBuffer.setLength(0);
          }
          develop(outputBuffer);
          return outputBuffer.toBuilderString();
      }
docs: /*
  (non-Javadoc)
  
  @see com.webfirmframework.wffweb.tag.Base#toValueString()