allow resources to retrieve services

Author: Jamie Hannaford

src/Common/Api/Operator.php

@@ -15,7 +15,7 @@
 abstract class Operator implements OperatorInterface
 {
     /** @var ClientInterface */
-    private $client;
+    protected $client;
 
     /** @var ApiInterface */
     protected $api;

src/Common/Resource/AbstractResource.php

@@ -231,4 +231,12 @@ public function extractMultipleInstances(ResponseInterface $response, $key = nul
 
         return $resources;
     }
+
+    protected function getService()
+    {
+        $class = static::class;
+        $service = substr($class, 0, strpos($class, 'Models') - 1) . '\\Service';
+
+        return new $service($this->client, $this->api);
+    }
 }