Possible to load a screenshot from disk and match smaller image?

Hi,
I'd like to be able to load a screenshot from disk (in png format) and then check if a smaller image (also in png format and on disk) appears in the screenshot.
Is this possible to do in Sikuli, i'm using Java and sikulixapi.jar (1.1.4)?
If so, could you indicate the commands to use.

Thanks,
Mark

As a follow up i think i have worked it out by using the Finder class and then checking hasNext.
If there is a better way then please update.
Thanks