apply method

@override Future<String> apply(String content, Map<String, dynamic> context)

Implementation

@override
Future<String> apply(String content, Map<String, dynamic> context) async {
  return content.replaceAllMapped(_issetRegex, (match) {
    final expr = match.group(1)!.trim();
    final body = match.group(2)!.trim();

    try {
      final value = _evaluate(expr, context);
      final isSet = value != null;

      return isSet ? body : '';
    } catch (_) {
      return '';
    }
  });
}