Stop a findInPage call by specifying any of these actions:
- clearSelection - Clear the selection.
 - keepSelection - Translate the selection into a normal selection.
 - activateSelection - Focus and click the selection node.
 
Example
const view = fin.View.getCurrentSync();
view.addListener('found-in-page', (event) => {
    setTimeout(() => {
        view.stopFindInPage('clearSelection');
    }, 5000);
});
view.findInPage('a').then(results => {
    console.log(results);
});