Making Http Callout using Salesforce Apex, with PATCH workaround

makeHttpCallout.cls

public static HttpResponse makeHttpCallout(String url, String method, String body, Map<String,String> headers){

    HttpRequest request = new HttpRequest();
    Http http = new Http();

    if(method == 'PATCH'){
        request.setMethod('POST');
        url += '?_HttpMethod=PATCH';
    } else {
        request.setMethod(method);
    }

    request.setEndpoint(url);

    if(String.isNotBlank(body)){
        request.setBody(body);
    }

    if(headers != null){
        for(String key : headers.keySet()){
            request.setHeader(key, headers.get(key));
        }
    }
  
   return http.send(request);
}