for (final INode node : ((List<INode>) seq.get(1).accept(this, rule)))
rule.addVariable((RuleVariable) node.accept(this, rule));
clause = (RIFClause) seq.get(3);
} else
clause = (RIFClause) n.f0.choice;
clause.accept(this, rule);
return rule;
}
public Object visit(final RIFClause n, final IRuleNode argu) {
final Rule parent = (Rule) argu;