presto-main/src/main/java/io/prestosql/execution/buffer/PageBufferInfo.java/PageBufferInfo/toString
class PageBufferInfo:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("partition", partition)
                .add("bufferedPages", bufferedPages)
                .add("bufferedBytes", bufferedBytes)
                .add("rowsAdded", rowsAdded)
                .add("pagesAdded", pagesAdded)
                .toString();
    }