code: def perform_proxy_validate(self, proxied_service_ticket, headers=None):
          '''
          Fetch a response from the remote CAS `proxyValidate` endpoint.
          '''
          url = self._get_proxy_validate_url(ticket=proxied_service_ticket)
          logging.debug('[CAS] ProxyValidate URL: {}'.format(url))
          return self._perform_cas_call(
              url,
              ticket=proxied_service_ticket,
              headers=headers,
              f perform_proxy_validate(self, proxied_service_ticket, headers=None):
          '''
          Fetch a response from the remote CAS `proxyValidate` endpoint.
          '''
          url = self._get_proxy_validate_url(ticket=proxied_service_ticket)
          logging.debug('[CAS] ProxyValidate URL: {}'.format(url))
          return self._perform_cas_call(
              url,
              ticket=proxied_service_ticket,
              headers=headers,
              )
docs: Fetch a response from the remote CAS `proxyValidate` endpoint.