)  writerOpts := DataWriterOpenOptions{   Identifier: FileSetFileIdentifier{    Namespace:  testNs0ID,    Shard:      shard,    BlockStart: testWriterStart,   },  }  metadata := persist.NewMetadataFromIDAndTags(entries[0].ID(),   entries[0].Tags(),   persist.MetadataOptions{})  require.NoError(t, w.Open(writerOpts))   