presto-main/src/main/java/io/prestosql/operator/SpatialJoinOperator.java/SpatialJoinOperator/appendProbe
class SpatialJoinOperator:    private void appendProbe()
    {
        int outputChannelOffset = 0;
        for (int outputIndex : probeOutputChannels) {
            Type type = probeTypes.get(outputIndex);
            Block block = probe.getBlock(outputIndex);
            type.appendTo(block, probePosition, pageBuilder.getBlockBuilder(outputChannelOffset));
            outputChannelOffset++;
        }
    }