in src/langs/common/combinator.js [102:113]
findThrows(grammer, set = []) {
if (grammer.body) {
grammer.body.filter(node => {
if (node instanceof GrammerThrows) {
set.push(node);
} else if (node.body) {
this.findThrows(node, set);
}
});
}
return set;
}