We are using func_get_arg method to receive argument in a backward compatible way since we cannot modify function signature to add more params even with default params. Earlier I was hoping to use DI to create another child class with modified signature and load it depending upon where we are executing from, however since we had to revert DI, we add this workaround to unblock #27735.
Previously, we were using the `$formatted_meta_data` to build the final array.
However, this does not consider the fact that
`WC_Order_Item->get_formatted_meta_data` can exclude `meta_data` from the
result. There would be less `meta_data` objects return than the previous
implementation.
This fixes the issue by using the `$data['meta_data']` value as the main list of
meta data and only using `$formatted_meta_data` to optionally apply the
`display_key` and `display_value` properties.
vedanshujain
Shiki
Claudio Sanches