add code samples

demo/swagger.yml

@@ -109,6 +109,39 @@
             petstore_auth:
               - "write:pets"
               - "read:pets"
+        x-code-samples:
+          -
+            lang: PHP
+            source: |-
+              $form = new \PetStore\Entities\Pet();
+              $form->setPetType("Dog");
+              $form->setName("Rex");
+              // set other fields
+
+              try {
+                  $pet = $client->pets()->create($form);
+              } catch (UnprocessableEntityException $e) {
+                  var_dump($e->getErrors());
+              }
+          -
+            lang: C#
+            source: |-
+              PetStore.v1.Pet pet = new PetStore.v1.Pet();
+              pet.setApiKey("your api key");
+              pet.petType = PetStore.v1.Pet.TYPE_DOG;
+              pet.name = "Rex";
+              // set other fields
+
+              PetStoreResponse response = pet.create();
+              if (response.statusCode == HttpStatusCode.Created)
+              {
+                // Successfully created
+              }
+              else
+              {
+                // Something wrong -- check response for errors
+                Console.WriteLine(response.getRawResponse());
+              }
       put:
         tags:
           - "pet"
@@ -743,6 +776,7 @@
       required:
         - "name"
         - "photoUrls"
+        - "petType"
       discriminator: "petType"
       properties:
         petType: