What's the function of $editMode and $forceReload parameter in ProductRepository?

If I set $editMode=true or $forceReload=true, what will happen?

When should I set the parameter is true when using the ProductRepository?

Below is the codes in ProductRepository:

public function get($sku, $editMode = false, $storeId = null, $forceReload = false)
    $cacheKey = $this->getCacheKey([$editMode, $storeId]);
    if (!isset($this->instances[$sku][$cacheKey]) || $forceReload) {
        $product = $this->productFactory->create();

        $productId = $this->resourceModel->getIdBySku($sku);
        if (!$productId) {
            throw new NoSuchEntityException(__('Requested product doesn\'t exist'));
        if ($editMode) {
            $product->setData('_edit_mode', true);
        if ($storeId !== null) {
            $product->setData('store_id', $storeId);
        $this->cacheProduct($cacheKey, $product);
    if (!isset($this->instances[$sku])) {
        $sku = trim($sku);
    return $this->instances[$sku][$cacheKey];

As far as I can see, if you set either the editMode or the forceReload true, you will receive a fresh loaded model from the DB. Otherwise, you'll just receive a model from the cache.

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