code: public String contentshow(I_CmsXmlContentContainer container, String element) {
  
          return contentshow(container, element, null);
      }
docs: Returns the selected content element String value from the given XML content container, same as
  using the <code>&lt;cms:contentshow element="***" /&gt;</code> tag.<p>
  
  The locale for accessing the content is read form the current OpenCms users request context.<p>
  
  @param container the XML content container to read the content from
  @param element the element to show
  
  @return the selected content element String value from the given XML content container