check ref

charts/aws-event-sources/v0.1.0/questions.yaml

@@ -32,6 +32,8 @@
     default: "example.com"
     type: string
     required: true
+    $ref:
+      - definitions/interfaces
 - variable: knative.urlScheme
   description: "Specify the Knative URL Scheme"
   label: Knative URL Scheme