allow to get underlaying swagger api object from wrapper

Author: deviddev

src/Services/BillingoApiV3Service.php

@@ -253,6 +253,16 @@ public function api(string $name): self
         return $this;
     }
 
+    /**
+     * Get the underlaying Swagger API Object
+     *
+     * @return Swagger\Client\Api\$Object
+     */
+    public function getApi()
+    {
+        return $this->api;
+    }
+
     /**
      * Get id from response
      *