public function sync_managed_variation_stock_status( &$product ) {
		global $wpdb;

		if ( $product->get_manage_stock() ) {
			$children = $product->get_children();
			$changed  = false;

			if ( $children ) {
				$status           = $product->get_stock_status();
				$format           = array_fill( 0, count( $children ), '%d' );
				$query_in         = '(' . implode( ',', $format ) . ')';
				$managed_children = array_unique( $wpdb->get_col( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_manage_stock' AND meta_value != 'yes' AND post_id IN {$query_in}", $children ) ) ); // @codingStandardsIgnoreLine.
				foreach ( $managed_children as $managed_child ) {
					if ( update_post_meta( $managed_child, '_stock_status', $status ) ) {
						$this->update_lookup_table( $managed_child, 'wc_product_meta_lookup' );
						$changed = true;
					}
				}
			}

			if ( $changed ) {
				$children = $this->read_children( $product, true );
				$product->set_children( $children['all'] );
				$product->set_visible_children( $children['visible'] );
			}
		}
	}