Given the following PHP doc:
/**
* Retrieve all completed order IDs associated with the given products.
*
* @template T of 'id'|'product=>id'
* @param WC_Product[] $products Array of daily package products
* @param array $interval Array of start and end datetime to filter (UTC)
* @param T $fields Fields to select. Can be 'id' or 'product=>id'
*
* @return (T is 'id' ? int[] : array<int, int[]>)
*/
I'd expect my_functions( $products, $interval, 'parent=>id' ) to infer array<int, int[]> but that's not happening, devsense is just inferring int[]
