Unchecked call to map(Func1() as a member of raw type rx.Observable

Question

I have written the following code to integrate generics into the following method. As evident I'm quite a newbie with Generics (haven't created them myself before). The following method is generating weird warning

private static PublishSubject mPublishSubject;

public <T> void register(final Class<T> type, Action1<T> observerAction) {
        mPublishSubject.filter(new Func1<T, Boolean>() {
            @Override
            public Boolean call(T o){
                Timber.e("Filter(): object type: %s typeClass is: %s", o.getClass(), type);
                if(o.getClass().equals(type)) {
                    Timber.e("Filer() return true");
                    return true;
                }
                Timber.e("Filer() return false");
                return false;
            }
        }).map(new Func1<T, T>() {
            @Override
            public T call(@NonNull T o) {
                Timber.e("Map(): object received from filter: %s", o);
                return o;
            }
        }).subscribe(observerAction);
    }

Following are the warnings that I'm getting.

Unchecked call to map(Func1(<? super T, ? extends R>) as a member of raw type rx.Observable.

Unchecked call to subscribe(Action1(<? super T>) as a member of raw type rxObservable.

What do these warnings mean & where am I making mistake?