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(PECL solr >= 0.9.2)
SolrQuery::setFacetPrefix — Specifies a string prefix with which to limits the terms on which to facet
$prefix
[, string $field_override
] )Specifies a string prefix with which to limits the terms on which to facet.
prefix
The prefix string
field_override
The name of the field.
Returns the current SolrQuery object, if the return value is used.