protected function update_post_meta( &$product, $force = false ) {
		$meta_key_to_props = array(
			'_sku'                   => 'sku',
			'_regular_price'         => 'regular_price',
			'_sale_price'            => 'sale_price',
			'_sale_price_dates_from' => 'date_on_sale_from',
			'_sale_price_dates_to'   => 'date_on_sale_to',
			'total_sales'            => 'total_sales',
			'_tax_status'            => 'tax_status',
			'_tax_class'             => 'tax_class',
			'_manage_stock'          => 'manage_stock',
			'_backorders'            => 'backorders',
			'_low_stock_amount'      => 'low_stock_amount',
			'_sold_individually'     => 'sold_individually',
			'_weight'                => 'weight',
			'_length'                => 'length',
			'_width'                 => 'width',
			'_height'                => 'height',
			'_upsell_ids'            => 'upsell_ids',
			'_crosssell_ids'         => 'cross_sell_ids',
			'_purchase_note'         => 'purchase_note',
			'_default_attributes'    => 'default_attributes',
			'_virtual'               => 'virtual',
			'_downloadable'          => 'downloadable',
			'_product_image_gallery' => 'gallery_image_ids',
			'_download_limit'        => 'download_limit',
			'_download_expiry'       => 'download_expiry',
			'_thumbnail_id'          => 'image_id',
			'_stock'                 => 'stock_quantity',
			'_stock_status'          => 'stock_status',
			'_wc_average_rating'     => 'average_rating',
			'_wc_rating_count'       => 'rating_counts',
			'_wc_review_count'       => 'review_count',
		);

		// Make sure to take extra data (like product url or text for external products) into account.
		$extra_data_keys = $product->get_extra_data_keys();

		foreach ( $extra_data_keys as $key ) {
			$meta_key_to_props[ '_' . $key ] = $key;
		}

		$props_to_update = $force ? $meta_key_to_props : $this->get_props_to_update( $product, $meta_key_to_props );

		foreach ( $props_to_update as $meta_key => $prop ) {
			$value = $product->{"get_$prop"}( 'edit' );
			$value = is_string( $value ) ? wp_slash( $value ) : $value;
			switch ( $prop ) {
				case 'virtual':
				case 'downloadable':
				case 'manage_stock':
				case 'sold_individually':
					$value = wc_bool_to_string( $value );
					break;
				case 'gallery_image_ids':
					$value = implode( ',', $value );
					break;
				case 'date_on_sale_from':
				case 'date_on_sale_to':
					$value = $value ? $value->getTimestamp() : '';
					break;
			}

			$updated = $this->update_or_delete_post_meta( $product, $meta_key, $value );

			if ( $updated ) {
				$this->updated_props[] = $prop;
			}
		}

		// Update extra data associated with the product like button text or product URL for external products.
		if ( ! $this->extra_data_saved ) {
			foreach ( $extra_data_keys as $key ) {
				$meta_key = '_' . $key;
				$function = 'get_' . $key;
				if ( ! array_key_exists( $meta_key, $props_to_update ) ) {
					continue;
				}
				if ( is_callable( array( $product, $function ) ) ) {
					$value   = $product->{$function}( 'edit' );
					$value   = is_string( $value ) ? wp_slash( $value ) : $value;
					$updated = $this->update_or_delete_post_meta( $product, $meta_key, $value );

					if ( $updated ) {
						$this->updated_props[] = $key;
					}
				}
			}
		}

		if ( $this->update_downloads( $product, $force ) ) {
			$this->updated_props[] = 'downloads';
		}
	}