code: @Nullable
    public ObjectRes postMeta(@NotNull final Meta meta) throws IOException {
      return doWork(auth -> doRequest(auth, new MetaPost(meta), AuthHelper.join(auth.getHref(), PATH_OBJECTS)), Operation.Upload);
    }
docs: Get metadata for object by hash.
  
  @param meta Object meta.
  @return Object metadata or null, if object not found.
  @throws IOException