extract method

@override List extract(dynamic input)

Process input and extract necessary data.

• Note: the output is usually passed to the next extractor in the chain.

Implementation

@override
List extract(input) {
  final inputSource = prepareInputSource(input);
  if (inputSource == null) {
    return [];
  } else {
    return [inputSource].map((e) => e.trim()).toList();
  }
}