@Override
    public final void getSize(SizeReadyCallback cb) {
        if (!Util.isValidDimensions(width, height)) {
            throw new IllegalArgumentException("Width and height must both be > 0 or Target#SIZE_ORIGINAL, but given"
                    + " width: " + width + " and height: " + height + ", either provide dimensions in the constructor"
                    + " or call override()");
        }
        cb.onSizeReady(width, height);
    }
Immediately calls the given callback with the sizes given in the constructor.

@param cb {@inheritDoc}
core/src/main/java/com/bumptech/glide/request/target/SimpleTarget.java