@Operation(summary = "Reports back to the presence of the endpoint without any content")
    @RequestMapping(method = RequestMethod.HEAD, produces = MediaType.APPLICATION_JSON_VALUE)
    public ResponseEntity head() {
        return ResponseEntity.ok().build();
    }
Head response entity.

@return the response entity
core/cas-server-core-web-api/src/main/java/org/apereo/cas/web/BaseCasRestActuatorEndpoint.java