code: @Override
      public final List<String> invoke() {
          final List<String> messages = new ArrayList<>();
          geoCodeAction();
          messages.add("Load complete");
          final long totalLocations = gcc.size();
          messages.add(totalLocations + " locations in the cache");
          final long codedLocations = totalLocations
                  - gcc.countNotFound();
          messages.add(codedLocations + " geocoded locations in cache");
          return messages;
      }
docs: {@inheritDoc}