code: public PropertyEditorRegistry getPropertyEditorRegistry() {
          final HttpServletRequest servletRequest = getCurrentRequest();
          PropertyEditorRegistry registry = (PropertyEditorRegistry) servletRequest.getAttribute(GrailsApplicationAttributes.PROPERTY_REGISTRY);
          if (registry == null) {
              registry = new PropertyEditorRegistrySupport();
              PropertyEditorRegistryUtils.registerCustomEditors(this, registry, RequestContextUtils.getLocale(servletRequest));
              servletRequest.setAttribute(GrailsApplicationAttributes.PROPERTY_REGISTRY, registry);
          }
          return registry;
      }
docs: Obtains the PropertyEditorRegistry instance.
  @return The PropertyEditorRegistry