asStringOrNull function

String? asStringOrNull(
  1. Map<String, dynamic>? json,
  2. String key
)

Convert any map value with key to String or null safely.

Implementation

String? asStringOrNull(
  Map<String, dynamic>? json,
  String key,
) {
  if (json == null || !json.containsKey(key)) return null;
  return toStringOrNull(json[key]);
}