* @param item the item to be classified; needs to have meaningful toString()
* @return a meaningful classification.
*/
public String getClassification(Object item) {
if (getCategories().size() == 0) {
throw new ClassifierException("No categories; please train before classification"
+ " or provide default category.");
}
ClassifierProbability[] probs = getProbabilities(item);
ClassifierProbability cp = probs[0];