code: function (url, type, contentType, headers, data, callback){
                  this.setUrl(url);
                  this.setType(type, callback);
                  if(contentType) this.setContentType(contentType);
                  if(headers) this.setHeaders(headers);
                  if(data) this.setData(data);
                  else this.data = "";
                  this.callback = callback;
  
                  this.ajaxCall(this, callback);
              }
docs: SETTINGS