presto-main/src/main/java/io/prestosql/execution/buffer/OutputBufferInfo.java/OutputBufferInfo/toString
class OutputBufferInfo:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("type", type)
                .add("state", state)
                .add("canAddBuffers", canAddBuffers)
                .add("canAddPages", canAddPages)
                .add("totalBufferedBytes", totalBufferedBytes)
                .add("totalBufferedPages", totalBufferedPages)
                .add("totalRowsSent", totalRowsSent)
                .add("totalPagesSent", totalPagesSent)
                .add("buffers", buffers)
                .toString();
    }