Adding a check for observable array elements using knockout.validation

I am trying to check the fields in the following form structure using knockout.validation.

form body:
  static fields (observables) 
  field_container:(observableArray)
     n dynamic fields (observables)  

Here's a simple implementation in jsfiddle. http://jsfiddle.net/D6Ltg/4/ I can check static fields when calling errors.showAllMessages, but dynamic fields are not checked. How can I check observables in observable array?

Edit: RTFM: https://github.com/ericmbarnard/Knockout-Validation/wiki/Configuration Adding grouping: {deep: true} to the configuration makes all nested structures valid.