public DrawableRequestBuilder<ModelType> bitmapTransform(Transformation<Bitmap>... bitmapTransformations) {
        GifBitmapWrapperTransformation[] transformations =
                new GifBitmapWrapperTransformation[bitmapTransformations.length];
        for (int i = 0; i < bitmapTransformations.length; i++) {
            transformations[i] = new GifBitmapWrapperTransformation(glide.getBitmapPool(), bitmapTransformations[i]);
        }
        return transform(transformations);
    }
Transform {@link GlideDrawable}s using the given {@link Bitmap} transformations. Replaces any
previous transformations.

@see #fitCenter()
@see #centerCrop()
@see #transform(BitmapTransformation...)
@see #transform(Transformation[])

@return This request builder.
core/src/main/java/com/bumptech/glide/DrawableRequestBuilder.java