code: protected void setContentEnd(String contentEnd) {
          if (contentEnd == null) {
              contentEnd = StringUtils.EMPTY;
          }
          this.contentEnd = contentEnd;
      }
docs: <p>Sets the content end text.</p>
  
  <p><code>null</code> is accepted, but will be converted to
  an empty String.</p>
  
  @param contentEnd  the new content end text