Add method for retrieving stored messages

src/Api/Message.php

@@ -163,6 +163,22 @@ public function getMessageQueueStatus(string $domain, array $requestHeaders = []
         return $this->hydrateResponse($response, QueueStatusResponse::class);
     }
 
+    /**
+     * @param string $domain
+     * @param string $storageId
+     * @param array $requestHeaders
+     * @return ShowResponse
+     * @throws ClientExceptionInterface
+     */
+    public function retrieveStoredMessage(string $domain, string $storageId, array $requestHeaders = []): ShowResponse
+    {
+        Assert::notEmpty($domain);
+        Assert::notEmpty($storageId);
+        $response = $this->httpGet(sprintf('/v3/domains/%s/messages/%s', $domain, $storageId), [], $requestHeaders);
+
+        return $this->hydrateResponse($response, ShowResponse::class);
+    }
+
     /**
      * @param array $filePath array('fileContent' => 'content') or array('filePath' => '/foo/bar')
      *

src/Model/Message/SendResponse.php

@@ -27,6 +27,10 @@ private function __construct()
     {
     }
 
+    /**
+     * @param array $data
+     * @return self
+     */
     public static function create(array $data): self
     {
         $model = new self();
@@ -36,11 +40,17 @@ public static function create(array $data): self
         return $model;
     }
 
+    /**
+     * @return string
+     */
     public function getId(): string
     {
         return $this->id;
     }
 
+    /**
+     * @return string
+     */
     public function getMessage(): string
     {
         return $this->message;