blic&nbsp;GeohashHaversineFunction(<a href="http://lucene.apache.org/core/5_1_0/queries/org/apache/lucene/queries/function/ValueSource.html?is-external=true" title="class or interface in org.apache.lucene.queries.function">ValueSource</a>&nbsp;geoHash1,
                        <a href="http://lucene.apache.org/core/5_1_0/queries/org/apache/lucene/queries/function/ValueSource.html?is-external=true" title="class or interface in org.apache.lucene.queries.function">ValueSource</a>&nbsp;geoHash2,
               