(PECL solr >= 0.9.2) Used for custom serialization

(PECL solr >= 0.9.2) Returns the term prefix

(PECL solr >= 0.9.2) Returns an array containing all the fields in the document

(PECL solr >= 0.9.2) Specifies the type of algorithm to use when faceting a field

(PECL solr >= 0.9.2) Checks if the current position internally is still valid

(PECL solr >= 0.9.2) Returns all the stats facets that were set

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

(PECL solr >= 2.2.0) Returns group functions (group.func parameter values)

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

(PECL solr >= 2.2.0) Returns the expand query expand.q parameter