presto-main/src/main/java/io/prestosql/execution/buffer/OutputBufferInfo.java/OutputBufferInfo/summarize
class OutputBufferInfo:    public OutputBufferInfo summarize()
    {
        return new OutputBufferInfo(type, state, canAddBuffers, canAddPages, totalBufferedBytes, totalBufferedPages, totalRowsSent, totalPagesSent, ImmutableList.of());
    }