This option specifies additional configuration options that can be supplied to the query processor. The allowed values are specified under padre query processor options.
Query processor set to perform Same Site Suppression, along with using synonyms:
Query processor set to sort the top results by filesize:
Query processor set to upweight title text to twice the original weight, sort all results by date and use word stemming when searching for results:
query_processor_options=-wmeta.t=2.0 -sort=date -sortall -stem=2