public Rule addRule(String name, Node condition) {
		Rule rule = new Rule(name, condition);
		rules.put(name, rule);
		return rule;
	}
public Rule addRule ( String name , Node condition ) { Rule rule = new Rule ( name , condition ) ; rules . put ( name , rule ) ; return rule ; }
Add a rule to this program.
<p>
@param name      is the rule name
@param condition is the rule condition
@return the rule