public function setActionID($actionID)
    {
        if (0 == strlen($actionID)) {
            throw new PAMIException('ActionID cannot be empty.');
        }

        if (strlen($actionID) > 69) {
            throw new PAMIException('ActionID can be at most 69 characters long.');
        }

        $this->setKey('ActionID', $actionID);
    }