anchor.diff:    BuildContext context;
     String filter;
     Map<int, String> tokens;
  +  Map<int, List<Api>> carry;
     String projectName;
   
     Future<List<Api>> getApisPage(int pageIndex) {
  
positive.code:     }
      if (offset == 0) {
        tokens = Map();
      }
      final client = getClient();
      final request = ListApisRequest();
  
negative.code:     if (token != null) {
        request.pageToken = token;
      }
      List<Api> apis = [];
      if (carry[offset] != null) {
        apis.addAll(carry[offset]);
      }
      try {
        var response = await client.listApis(request, options: callOptions());
        apis.addAll(response.apis);
        while ((apis.length < limit) && (response.nextPageToken != "")) {
          request.pageToken = response.nextPageToken;
          response = await client.listApis(request, options: callOptions());
          apis.addAll(response.apis);
          if (response.nextPageToken == "" ||
              response.nextPageToken == request.pageToken) {
            break;
          }
        }
        tokens[offset + limit] = response.nextPageToken;
        if (apis.length > limit) {
          carry[offset] = apis.sublist(limit);
          apis = apis.sublist(0, limit);
        }
        return apis;
      } catch (err) {
        reportError(context, err);
  