/**
* Gets the main extras categories. This actually returns the direct named subclasses of the
* Extras class.
*
* @return A <code>Collection</code> of <code>OWLNamedClasses</code>
*/
public Collection getCoffeeExtrasCategories() throws OWLReasonerException {
OWLClass extrasCls = this.getNamedClass(PREFERENCES.getExtrasClassName());
return extrasCls.getSubClasses(ontology);
}
