/**
  * Set the signer to the list of signers for this request
  *
  * @param  string $role
  * @param  mixed $email_or_signer
  * @param  string $name
  * @return TemplateSignatureRequest
  * @see    AbstractSignatureRequest::addSigner()
  */
 public function setSigner($role, $email_or_signer, $name = null)
 {
     return parent::addSigner($email_or_signer, $name, $role);
 }