title: Skip validation if sibling (checkbox) field contains 'false'
body: <p>I have a form containing a checkbox and a "value field". The value field could be anything, a text box, a compound field, a collection - anything.</p>
  
  <p>The form could look like this, for example:</p>
  
  <pre><code>field_1_label    enabled    [x]
                   value      [________]
  
  field_2_label    enabled    [x]
                   value      sub_field_1    [________]
                              sub_field_2    [________]
  
  field_3_label    enabled    [x]
                   value      [________]
  </code></pre>
  
  <p>When the "enabled" field contains <code>true</code>, everything works fine already. When the "enabled" field contains <code>false</code>, I would like to <strong>disable validation on the value field and it's child fields</strong>.</p>
  
  <p>So when "enabled" is un-checked, I will effectively ignore the field. I will still display it in the form, but I won't store the data and I certainly don't want it validated.</p>
  
  <p>Does anybody have suggestions for how I might do this? Specifically, I'm having problems getting the validation system to ignore the value field <em>and</em> any potential child fields.</p>