Function setUnion

tests/sync/util.js:440–442

* Computes setA U setB. * * @template T * @param {Set. } setA * @param {Set. }setB * @returns {Set. } The union of setA and setB

(setA, setB)

 * @returns {Set.<T>} The union of setA and setB
 */
function setUnion(setA, setB) {
  return new Set([...setA, ...setB]);
}

/**
 * Checks if two sets contain the same elements.