(PECL solr >= 2.2.0)
SolrCollapseFunction::getNullPolicy — Returns null policy
public SolrCollapseFunction::getNullPolicy ( ) : string
Returns null policy used or null
This function has no parameters.
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/solrcollapsefunction.getnullpolicy.php