/**
* Returns the input variables (possibly underspecified, with slots to fill) for the rule
*
* @return the set of labels for the input variables
*/
public Set<Template> getInputVariables() {
Set<Template> inputVars = new HashSet<Template>();
for (RuleCase c : cases) {
inputVars.addAll(c.getInputVariables());
}
return inputVars;
}
