BAEL-4710 - Hiding endpoints using @Hidden (#10431)

* Added code for checking if a class is abstract or not.

* Renamed test name as per review comments.

* BAEL-4695 - Added code to evaluate math expressions.

* BAEL-4695 - Added test case for math function.

* BAEL-4695 Added consistent examples and entry in parent pom.

* BAEL-4695 - Added more examples

* BAEL-4710 - Hiding endpoints using @Hidden

spring-boot-modules/spring-boot-springdoc/src/main/java/com/baeldung/springdoc/controller/RegularRestController.java

@@ -0,0 +1,31 @@
+package com.baeldung.springdoc.controller;
+
+import java.time.LocalDate;
+import java.time.LocalTime;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import io.swagger.v3.oas.annotations.Hidden;
+
+@Hidden
+@RestController
+public class RegularRestController {
+
+    @Hidden
+    @GetMapping("/getAuthor")
+    public String getAuthor() {
+        return "Umang Budhwar";
+    }
+
+    @GetMapping("/getDate")
+    public LocalDate getDate() {
+        return LocalDate.now();
+    }
+
+    @GetMapping("/getTime")
+    public LocalTime getTime() {
+        return LocalTime.now();
+    }
+
+}