/**
  * Returns the given registrant's verified second factors.
  *
  * @param string $identityId
  * @return VettedSecondFactorCollection
  */
 public function findVettedByIdentity($identityId)
 {
     return $this->secondFactors->searchVetted((new VettedSecondFactorSearchQuery())->setIdentityId($identityId));
 }