(PECL solr >= 0.9.2) Sets the maximum number of highlighted snippets to generate per field

(PECL solr >= 2.2.0) Returns the group.main value

(PECL solr >= 2.2.0) Selects the group heads by the max value of a numeric field or function query.

(PECL solr >= 0.9.2) Custom serialization of SolrDocument objects

(PECL solr >= 0.9.2) Finalizes all add/deletes made to the index

(PECL solr >= 0.9.2) Returns the highlight field to use as backup or default

(PECL solr >= 0.9.2) Sets a field to use for similarity

(PECL solr >= 0.9.2) Removes one of the facet.date parameters

(PECL solr >= 2.2.0) Returns the group.offset value

(PECL solr >= 0.9.2) Returns the text which appears before a highlighted term