code: public CompletableFuture<Void> deleteTopicAsync(String path) {
          EntityNameHelper.checkValidTopicName(path);
          return deleteEntityAsync(path);
      }
docs: Deletes the topic described by the path relative to the service namespace base address.
  @param path - The name of the entity relative to the service namespace base address.
  @return A completable future that completes when the topic is deleted.
  @throws IllegalArgumentException - path is not null / empty / too long / invalid.