code: public WhitelistEnvelope deleteWhitelistCertificate(String dtid, String cid) throws ApiException {
          ApiResponse<WhitelistEnvelope> resp = deleteWhitelistCertificateWithHttpInfo(dtid, cid);
          return resp.getData();
      }
docs: Delete a whitelist certificate associated with a devicetype.
  Delete a whitelist certificate associated with a devicetype.
  @param dtid Device Type ID. (required)
  @param cid Certificate ID. (required)
  @return WhitelistEnvelope
  @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body