consul/ui-v2/app/validations/intention-permission-http-header.js

import { validatePresence } from 'ember-changeset-validations/validators';
import validateSometimes from 'ember-changeset-conditional-validations/validators/sometimes';
export default schema => ({
  Name: [validatePresence(true)],
  Value: validateSometimes([validatePresence(true)], function() {
    return this.get('HeaderType') !== 'Present';
  }),
});