Function memoize

packages/core/src/utils/normalize.ts:301–307

(obj: object)

function memoBuilder(): MemoFunc {
  const inner = new WeakSet<object>();
  function memoize(obj: object): boolean {
    if (inner.has(obj)) {
      return true;
    }
    inner.add(obj);
    return false;
  }

  function unmemoize(obj: object): void {
    inner.delete(obj);