DataloadSwitchController.cls

public with sharing class DataloadSwitchController {

    @AuraEnabled
    public static String toogleValidationRule(String validationRuleId, Boolean state){
        System.debug('Toggle apex method called');
        System.debug('validationRuleId: '+ validationRuleId);
        System.debug('state: ' + state);
        HttpResponse resp = new HttpResponse();
        resp.setStatusCode(204);
        resp.setBody('empty body');
        return serializeHttpResponse(resp); 
    }

    private static String serializeHttpResponse(HttpResponse httpResponse)
    {
        Parameters parameters = new Parameters();
        parameters.add('body', httpResponse.getBody());
        parameters.add('status', httpResponse.getStatus());
        parameters.add('statusCode', String.valueOf(httpResponse.getStatusCode()));
        
        return parameters.serialize();
    }
}