How can I export (/export)?

[thcrt]

Solr's docs explain the ability to export a result set. This would be extremely useful for reindexing for example when there is no single stored source of data. Is this possible with pysolr? I found a few issues and PRs about using custom request handlers, but none of them were merged, and to be honest I'm not sure if this actually counts as a custom request handler since it is part of Solr as it's shipped.