protected function getHistory($key = null)
    {
        return (true === isset($this->history[$key])) ? $this->history[$key] : null;
    }
protected function getHistory($key = null)
    {
        return (true === isset($this->history[$key])) ? $this->history[$key] : null;
    }
protected function getHistory ( $ key = null ) { return ( true === isset ( $ this -> history [ $ key ] ) ) ? $ this -> history [ $ key ] : null ; }
Getter for history.

@author Benjamin Carl <opensource@clickalicious.de>
@return string The value if set, otherwise NULL
@access protected
Getter for history .