ref
Atomically acquires a reference on the given @feature_list.
This function is MT-safe and may be called from any thread.
Return
The same @feature_list with an additional reference.
Since
2.42
Atomically acquires a reference on the given @feature_list.
This function is MT-safe and may be called from any thread.
The same @feature_list with an additional reference.
2.42