public void displayRaw(@NonNull ImageView img, @NonNull String path, int width, int height, IBoxingCallback callback) {
        if (ensureLoader()) {
            throw new IllegalStateException("init method should be called first");
        }
        mLoader.displayRaw(img, path, width, height, callback);
    }
A loader holding {@link IBoxingMediaLoader} to displayThumbnail medias.

@author ChenSL
boxing/src/main/java/com/bilibili/boxing/BoxingMediaLoader.java