s method

String s(
  1. String key, [
  2. String defaultValue = ''
])

获取 value 转 string

Implementation

String s(String key, [String defaultValue = '']) {
  final value = this[key];
  if (value is String) return value;
  if (value == null) {
    XLog.d('$key=null => String:$defaultValue');
    return defaultValue;
  }
  XLog.d('${value.runtimeType} $key=$value => String:$value');
  return value.toString();
}