code: private CmsValidationResult validateContent(CmsObject cms, CmsUUID structureId, CmsXmlContent content) {
  
          return validateContent(cms, structureId, content, null);
      }
docs: Validates the given XML content.<p>
  
  @param cms the cms context
  @param structureId the structure id
  @param content the XML content
  
  @return the validation result