public function setFixed($fixed)
    {
        if (is_bool($fixed)) {
            $this->fixed = $fixed;
        } else {
            $msg = "Fixed must be a boolean, '" . gettype($fixed) . "' given.";
            throw new InvalidArgumentException($msg);
        }
    }
public function setFixed($fixed)
    {
        if (is_bool($fixed)) {
            $this->fixed = $fixed;
        } else {
            $msg = "Fixed must be a boolean, '" . gettype($fixed) . "' given.";
            throw new InvalidArgumentException($msg);
        }
    }
public function setFixed ( $ fixed ) { if ( is_bool ( $ fixed ) ) { $ this -> fixed = $ fixed ; } else { $ msg = "Fixed must be a boolean, '" . gettype ( $ fixed ) . "' given." ; throw new InvalidArgumentException ( $ msg ) ; } }
Set if the section part is subject to shuffling.

@param boolean $fixed true if subject to shuffling, false if not.
@throws \InvalidArgumentException If $fixed is not a boolean.
Set if the section part is subject to shuffling .