public function can_extension_state()
{
$write = array(implode("\r\n", array('action: ExtensionState', 'actionid: 1432.123', 'exten: exten', 'context: context', '')));
$action = new \PAMI\Message\Action\ExtensionStateAction('exten', 'context');
$client = $this->_start($write, $action);
}