Function getOrCreate

core/utils/deepMap.ts:94–106

(path: unknown[], factory: () => V)

  }

  function getOrCreate(path: unknown[], factory: () => V) {
    const targetMap = getFinalTargetMap(path);

    if (targetMap.has(targetSymbol)) {
      return targetMap.get(targetSymbol) as V;
    }

    const newResult = factory();

    targetMap.set(targetSymbol, newResult);

    return newResult;
  }

  return { getOrCreate, has, set, get };
}