library/Rediska/Key/List.php
public function insert($position, $referenceValue, $value)
    {
        return $this->_getRediskaOn()->insertToList($this->getName(), $position, $referenceValue, $value);
    }
public function insert($position, $referenceValue, $value)
    {
        return $this->_getRediskaOn()->insertToList($this->getName(), $position, $referenceValue, $value);
    }
Insert a new value as the element before or after the reference value

@param string  $position       BEFORE or AFTER
@param mixed   $referenceValue Reference value
@param mixed   $value          Value
@return integer|boolean