src/QueryBuilder/Filters/Filter.php
protected function mergeBoolQuery(array $query1, array $query2, $type)
    {
        if (empty($query2['bool'][$type])) {
            return $query1;
        } else {
            if (empty($query1['bool'][$type])) {
                $query1['bool'][$type] = [];
            }
        }

        $query1['bool'][$type] = array_merge($query1['bool'][$type], $query2['bool'][$type]);

        return $query1;
    }
protected function mergeBoolQuery(array $query1, array $query2, $type)
    {
        if (empty($query2['bool'][$type])) {
            return $query1;
        } else {
            if (empty($query1['bool'][$type])) {
                $query1['bool'][$type] = [];
            }
        }

        $query1['bool'][$type] = array_merge($query1['bool'][$type], $query2['bool'][$type]);

        return $query1;
    }
Merges BOOL elasticsearch queries.

@param array $query1
@param array $query2
@param string $type must, must_not, should
@return array