code: def importExistingServerCertificate(self, alias, certPassword, certFile):
          
          url = self._url + "/sslcertificates/importExistingServerCertificate"
          files = {}
          files['certFile'] = certFile
          params = {
              "f" : "json",
              "alias" : alias,
              "certPassword" : certPassword
          }
          return self._post(url=url,
                              param_dict=params,
                              securityHandler=self._securityHandler,
                              files=files,
                              proxy_url=self._proxy_url,
                              proxy_port=self._proxy_port)
docs: This operation imports an existing server certificate, stored in the PKCS #12 format, into the keystore.