renameSync method
Synchronously renames this file system entity.
Returns a FileSystemEntity instance for the renamed entity.
Implementation
@override
File renameSync(String newPath) {
final file = assertIsFile(_fs, path, 'Cannot rename file to "$newPath"');
final newFile = MemoryFile._(_fs, newPath);
newFile.createSync();
_fs.remove(path); // Remove the old file.
_fs.set(newPath, file); // Copy the new file over
return newFile;
}