@Operation(summary = "Get thing", responses = {
			@ApiResponse(description = "Successful Operation", responseCode = "200", content = @Content(mediaType = "application/json", schema = @Schema(implementation = String.class))),
			@ApiResponse(responseCode = "404", description = "Not found", content = @Content(schema = @Schema(hidden = true))),
			@ApiResponse(responseCode = "401", description = "Authentication Failure", content = @Content(schema = @Schema(hidden = true))) })
	@RequestMapping(path = "/test", method = RequestMethod.GET)
	ResponseEntity<String> test() {
		return ResponseEntity.ok("Hello");
	}
Test response entity.

@return the response entity
springdoc-openapi-tests/springdoc-openapi-javadoc-tests/src/test/java/test/org/springdoc/api/v30/app35/HelloController.java