(PECL solr >= 2.2.0) Sets the NULL Policy

(PECL solr >= 0.9.2) Returns the maximum number of characters of the field to return

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

(PECL solr >= 0.9.2) Drops all the fields in the document

(PECL solr >= 0.9.2) Creates a copy of a SolrDocument object

(PECL solr >= 0.9.2) Returns the number of fields in the document

(PECL solr >= 0.9.7) Returns the debug data for the last connection attempt

(PECL solr >= 0.9.2) Returns a parameter value

(PECL solr >= 0.9.2) Checks if the property exists

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