Function setDiff

src/orchestration/staging.ts:200–204

(a: Set<T>, b: Set<T>)

}

function setDiff<T>(a: Set<T>, b: Set<T>): Set<T> {
  const out = new Set<T>();
  for (const x of a) if (!b.has(x)) out.add(x);
  return out;
}