protected function update_post_meta( &$product, $force = false ) {
		$meta_key_to_props = array(
			'_children' => 'children',
		);

		$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' );
			$updated = update_post_meta( $product->get_id(), $meta_key, $value );
			if ( $updated ) {
				$this->updated_props[] = $prop;
			}
		}

		parent::update_post_meta( $product, $force );
	}