+ // Due to rust's strict-ownership memory model, in some cases we need to "move"
+ // an object to pass exclusive ownership to the function being called.
+ // In most cases, we avoid ret_hu_conv being visible in GC'd languages by cloning the object
+ // at the FFI layer, creating a new object which Rust can claim ownership of
+ // However, in some cases (eg here), there is no way to clone an object, and thus
+ // we actually have to pass full ownership to Rust.
+ // Thus, after ret_hu_conv call, channel_features_arg is reset to null and is now a dummy object.
+ channel_features_arg.ptr = 0;