in packages/transform/src/leap.js [26:43]
function LoopEntry(breakLoc, continueLoc, label) {
Entry.call(this);
const t = getTypes();
t.assertLiteral(breakLoc);
t.assertLiteral(continueLoc);
if (label) {
t.assertIdentifier(label);
} else {
label = null;
}
this.breakLoc = breakLoc;
this.continueLoc = continueLoc;
this.label = label;
}