whatIsByCreator method Null safety

Future<List<WhatIs>?> whatIsByCreator(
  1. String did
)

Implementation

Future<List<WhatIs>?> whatIsByCreator(String did) async {
  try {
    final response = await httpClient.get<QueryWhatIsByCreatorResponse>('/who_is_controller/$did', contentType: "application/json");
    if (!response.isOk || response.body == null) {
      return null;
    }
    return response.body?.whatIs;
  } catch (e) {
    Log.warn("Failed to call query using REST API on $baseUrl/$query");
  }
  return null;
}