PortfoliosService portfoliosService = IntxServiceFactory.createPortfoliosService(client);
EnableDisableCrossCollateralRequest request = new EnableDisableCrossCollateralRequest.Builder()
    .enabled(True)
    .build();
EnableDisableCrossCollateralResponse response = portfoliosService.enableDisableCrossCollateral(request);

For more information, please visit the INTX Java SDK.