@Override
        public void remove(Bitmap bitmap) {
            if (!bitmaps.contains(bitmap)) {
                throw new IllegalStateException("Cannot remove bitmap not in tracker");
            }
            bitmaps.remove(bitmap);
        }
Constructor for LruBitmapPool.

@param maxSize The initial maximum size of the pool in bytes.
@param allowedConfigs A white listed set of {@link Bitmap.Config} that are allowed to be put
                      into the pool. Configs not in the allowed set will be rejected.
core/src/main/java/com/bumptech/glide/load/engine/bitmap_recycle/LruBitmapPool.java