diff --git a/examples/generic_pr/main.go b/examples/generic_pr/main.go
index 109804d..cb0246a 100644
--- a/examples/generic_pr/main.go
+++ b/examples/generic_pr/main.go
@@ -34,6 +34,12 @@ func (_ *RequestContext[T]) Do() func(r *RequestContext[T]) *RequestContext[T] {
 	}
 }
 
+func (_ *RequestContext[T]) FilterErr() func(r *RequestContext[T]) bool {
+	return func(r *RequestContext[T]) bool {
+		return r.err == nil
+	}
+}
+
 type someResult struct {
 	Title string `json:"title"`
 	Id    int    `json:"id"`
@@ -47,9 +53,7 @@ func main() {
 			req: *r,
 		}
 	}
-	results := lambda.Filter(parallel.Map(requests, requests[0].Do(), 4), func(r *RequestContext[someResult]) bool {
-		return r.err == nil
-	})
+	results := lambda.Filter(parallel.Map(requests, requests[0].Do(), 4), requests[0].FilterErr())
 	for _, v := range results {
 		log.Printf("%s", v)
 	}