Adding get extension operation
diff --git a/openstack/networking/v2/networks/results.go b/openstack/networking/v2/networks/results.go
index e601c57..61d51b0 100644
--- a/openstack/networking/v2/networks/results.go
+++ b/openstack/networking/v2/networks/results.go
@@ -128,3 +128,12 @@
 func ToAPIResource(results gophercloud.Collection) []APIResource {
 	return results.(*APIInfoList).APIResources
 }
+
+type Extension struct {
+	Updated     string        `json:"updated"`
+	Name        string        `json:"name"`
+	Links       []interface{} `json:"links"`
+	Namespace   string        `json:"namespace"`
+	Alias       string        `json:"alias"`
+	Description string        `json:"description"`
+}