text: public virtual IntervalSet Look(ATNState s, ATNState stopState, RuleContext ctx){IntervalSet r = new IntervalSet();bool seeThruPreds = true;PredictionContext lookContext = ctx != null ? PredictionContext.FromRuleContext(s.atn, ctx) : null;Look(s, stopState, lookContext, r, new HashSet<ATNConfig>(), new BitSet(), seeThruPreds, true);return r;}