Sets the NULL Policy

# SolrCollapseFunction::setNullPolicy

(PECL solr >= 2.2.0)

SolrCollapseFunction::setNullPolicy — Sets the NULL Policy

### Beschreibung

public function SolrCollapseFunction::setNullPolicy(string `$nullPolicy`): SolrCollapseFunction

Sets the NULL Policy. One of the 3 policies defined as class constants shall be passed. Accepts ignore, expand, or collapse policies.

### Parameter-Liste

`nullPolicy`

### Rückgabewerte

SolrCollapseFunction

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