code: @Override
      public Map<String, String> loadDocStrings(Set<ServiceConfig> serviceConfigs) {
          return serviceConfigs.stream()
                               .flatMap(c -> c.service().as(THttpService.class).get().entries().values().stream())
                               .flatMap(entry -> entry.interfaces().stream().map(Class::getClassLoader))
                               .flatMap(loader -> docstringExtractor.getAllDocStrings(loader)
                                                                    .entrySet().stream())
                               .collect(toImmutableMap(Map.Entry::getKey, Map.Entry::getValue, (a, b) -> a));
      }
docs: Methods related with extracting documentation strings.