diff --git a/idiom/functional-options.md b/idiom/functional-options.md
index 4c4e677..a9331ed 100644
--- a/idiom/functional-options.md
+++ b/idiom/functional-options.md
@@ -93,8 +93,9 @@ if err != nil {
 }
 ```
 
-## Packages
+## Relative
 
-Packages helps you understand how this pattern works:
+Relative links and source codeview that helps you understand how this pattern works and  can be extended to fit your needs:
 
 - [go-options](https://github.com/kataras/go-options)
+- [configuration.go:26](https://github.com/kataras/iris/blob/master/configuration.go#L26), [configuration.go:160](https://github.com/kataras/iris/blob/master/configuration.go#L160), [iris.go:202](https://github.com/kataras/iris/blob/master/iris.go#L202)