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export default function superset(values, other) {
const iterator = values[Symbol.iterator](), set = new Set();
for (const o of other) {
const io = intern(o);
if (set.has(io)) continue;
let value, done;
while (({value, done} = iterator.next())) {
if (done) return false;
const ivalue = intern(value);
set.add(ivalue);
if (Object.is(io, ivalue)) break;
}
}
return true;
}
function intern(value) {
return value !== null && typeof value === "object" ? value.valueOf() : value;
}