RequestData constructor
      
      RequestData({ 
    
    
- required String url,
- String? urlFragment,
- required String method,
- required Headers headers,
- bool? hasPostData,
- List<PostDataEntry> ? postDataEntries,
- MixedContentType? mixedContentType,
- required ResourcePriority initialPriority,
- required RequestReferrerPolicy referrerPolicy,
- bool? isLinkPreload,
- TrustTokenParams? trustTokenParams,
- bool? isSameSite,
Implementation
RequestData({
  required this.url,
  this.urlFragment,
  required this.method,
  required this.headers,
  this.hasPostData,
  this.postDataEntries,
  this.mixedContentType,
  required this.initialPriority,
  required this.referrerPolicy,
  this.isLinkPreload,
  this.trustTokenParams,
  this.isSameSite,
});