Automattic\WooCommerce\Internal\RestApi\Routes\V4\Refunds\Schema

RefundSchema::filter_internal_meta_keys │ protected │ WC 1.0

With HPOS, few internal meta keys such as _billing_address_index, _shipping_address_index are not considered internal anymore (since most internal keys were flattened into dedicated columns).

This function helps in filtering out any remaining internal meta keys with HPOS is enabled.

Method of the class: RefundSchema{}

No Hooks.

Returns

Array. Filtered order meta data.

Usage

// protected - for code of main (parent) or child class
$result = $this->filter_internal_meta_keys( $meta_data );
$meta_data(array) (required)
Order meta data.

RefundSchema::filter_internal_meta_keys() code WC 10.4.3

woocommerce/src/Internal/RestApi/Routes/V4/Refunds/Schema/RefundSchema.php 
protected function filter_internal_meta_keys( $meta_data ) {
	if ( ! OrderUtil::custom_orders_table_usage_is_enabled() ) {
		return $meta_data;
	}
	$cpt_hidden_keys = ( new \WC_Order_Data_Store_CPT() )->get_internal_meta_keys();
	$meta_data       = array_filter(
		$meta_data,
		function ( $meta ) use ( $cpt_hidden_keys ) {
			return ! in_array( $meta->key, $cpt_hidden_keys, true );
		}
	);
	return array_values( $meta_data );
}