rewriteDependencies static method 
    
      
void
rewriteDependencies(
 - String targetPubspecPath, 
- Map<String, dynamic> oldDeps
) 
    
    
  Implementation
  static void rewriteDependencies(String targetPubspecPath, Map<String, dynamic> oldDeps) {
  final file = File(targetPubspecPath);
  if (!file.existsSync()) {
    throw Exception('pubspec.yaml not found at $targetPubspecPath');
  }
  final content = file.readAsStringSync();
  final editor = YamlEditor(content);
  editor.update(['dependencies'], oldDeps['dependencies'] ?? {});
  editor.update(['dev_dependencies'], oldDeps['dev_dependencies'] ?? {});
  file.writeAsStringSync(editor.toString());
}