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filter is not described

(hook_prefix)shipping_class_id filter-hook . WC 1.0

Usage

add_filter( '(hook_prefix)shipping_class_id', 'filter_function_name_4900', 10, 2 );
function filter_function_name_4900( $parent_data_shipping_class_id, $that ){
	// filter...

	return $parent_data_shipping_class_id;
}
$parent_data_shipping_class_id
-
$that
-

Where the hook is called

WC_Product_Variation::get_shipping_class_id()
(hook_prefix)shipping_class_id
woocommerce/includes/class-wc-product-variation.php 406
$shipping_class_id = apply_filters( $this->get_hook_prefix() . 'shipping_class_id', $this->parent_data['shipping_class_id'], $this );

Where in WP core the hook is used WooCommerce

Usage not found.