(PECL solr >= 2.2.0) Returns min parameter

(PECL solr >= 2.2.0) Sets the initial size of the collapse data structures when collapsing on a numeric field

(PECL solr >= 2.2.0) Returns a string representing the constructed collapse function

(PECL solr >= 2.2.0) Returns the field that is being collapsed on.

(PECL solr >= 2.2.0) Sets the field to collapse on

(PECL solr >= 2.2.0) Returns size parameter

(PECL solr >= 2.2.0) Sets the NULL Policy

(PECL solr >= 2.2.0) Sets the initial size of the collapse data structures when collapsing on a numeric field

(PECL solr >= 2.2.0) Constructor

(PECL solr >= 2.2.0) Returns max parameter