protected function set_content_handler($handler)
	{
		$this->handler_object = null;
		$this->content_handler = (string) $handler;
		return $this;
	}
protected function set_content_handler($handler)
	{
		$this->handler_object = null;
		$this->content_handler = (string) $handler;
		return $this;
	}
protected function set_content_handler ( $ handler ) { $ this -> handler_object = null ; $ this -> content_handler = ( string ) $ handler ; return $ this ; }
Decides a content handler that makes it possible to write non-strings to a file

@param   string
@return  Cache_Storage_Driver
Decides a content handler that makes it possible to write non - strings to a file