public function setValue($value, $format = null)
    {
        $this->value = $this->decode($value, $format);
    }
public function setValue($value, $format = null)
    {
        $this->value = $this->decode($value, $format);
    }
public function setValue ( $ value , $ format = null ) { $ this -> value = $ this -> decode ( $ value , $ format ) ; }
Set the seed value, optionally specifying an input format

@param  string  $value  The seed value.
@param  string  $format Optional; input format. If not provided, format
will be auto-detected.
@return self    Returns an instance of self for method chaining.
Set the seed value optionally specifying an input format