updateUri method
Implementation
String updateUri(String uri) {
if (uri == 'package:$oldName/$oldName.dart') {
return 'package:$newName/$newName.dart';
} else if (uri.startsWith('package:$oldName/')) {
return 'package:$newName/${uri.replaceFirst('package:$oldName/', '')}';
} else {
return uri;
}
}