test.js

function removeAllChanges(accept) {
    TXTextControl.trackedChanges.getCount(count => {

        if (count === 0) return;

        // recursively loop through all changes
        // and remove them
        TXTextControl.trackedChanges.elementAt(0, element => {
            TXTextControl.trackedChanges.remove(element, accept, deleted => {
                if (deleted === true) removeAllChanges(accept);
            });
        });

    });
}