code: protected long loadAll( NodeSequence sequence,
                              QueueBuffer<BufferedRow> buffer,
                              AtomicLong batchSize ) {
          return loadAll(sequence, buffer, batchSize, null, 0);
      }
docs: Load all of the rows from the supplied sequence into the buffer.
  
  @param sequence the node sequence; may not be null
  @param buffer the buffer into which all rows should be loaded; may not be null
  @param batchSize the atomic that should be set with the size of the first batch
  @return the total number of rows