WordPress at a glance
filter is not described

woocommerce_hidden_order_itemmeta filter-hook . WC 1.0

Get items to display in the preview as HTML.

Usage

add_filter( 'woocommerce_hidden_order_itemmeta', 'filter_function_name_9544' );
function filter_function_name_9544( $order ){
	// filter...

	return $order;
}
$order(WC_Order)
Order object.

Where the hook is called

WC_Admin_List_Table_Orders::get_order_preview_item_html()
woocommerce_hidden_order_itemmeta
woocommerce/includes/admin/list-tables/class-wc-admin-list-table-orders.php 443-458
$hidden_order_itemmeta = apply_filters(
	'woocommerce_hidden_order_itemmeta',
	array(
		'_qty',
		'_tax_class',
		'_product_id',
		'_variation_id',
		'_line_subtotal',
		'_line_subtotal_tax',
		'_line_total',
		'_line_tax',
		'method_id',
		'cost',
		'_reduced_stock',
	)
);
woocommerce/includes/admin/meta-boxes/views/html-order-item-meta.php 6-21
$hidden_order_itemmeta = apply_filters(
	'woocommerce_hidden_order_itemmeta',
	array(
		'_qty',
		'_tax_class',
		'_product_id',
		'_variation_id',
		'_line_subtotal',
		'_line_subtotal_tax',
		'_line_total',
		'_line_tax',
		'method_id',
		'cost',
		'_reduced_stock',
	)
);

Where in WP core the hook is used WooCommerce

Usage not found.