saveFile method
save json file in cache(temp directory) with with given name using instance member
Implementation
bool saveFile({
required Map<String, dynamic> file,
required String cachedFileName})
{
File jsonFile;
String _filePath = tempDirectory.path + '/$cachedFileName.json';
jsonFile = new File(_filePath);
jsonFile.writeAsStringSync(json.encode(file));
return true;
}