public function thisProductIsAlsoPricedAtInChannel(ProductInterface $product, $price, ChannelInterface $channel)
{
$product->addChannel($channel);
/** @var ProductVariantInterface $productVariant */
$productVariant = $this->defaultVariantResolver->getVariant($product);
/** @var ChannelPricingInterface $channelPricing */
$channelPricing = $this->channelPricingFactory->createNew();
$channelPricing->setPrice($price);
$channelPricing->setChannel($channel);
$productVariant->addChannelPricing($channelPricing);
$this->objectManager->flush();
}