44      * @param ATNState|null $s The ATN state
49     public function getDecisionLookahead(?ATNState $s) : ?array  argument
51         if ($s === null) {
56         for ($alt = 0; $alt < $s->getNumberOfTransitions(); $alt++) {
62                 $s->getTransition($alt)->target,
93      * @param ATNState         $s         The ATN state.
103     public function look(ATNState $s, ?ATNState $stopState, ?RuleContext $context) : IntervalSet  argument
108         $lookContext = $context !== null && $s->atn !== null ?
109             PredictionContext::fromRuleContext($s->atn, $context) :
113             $s,
136      * @param ATNState               $s               The ATN state.
175         ATNState $s,  argument
184         $c = new ATNConfig(null, $s, $context, null, 0);
190         if ($stopState !== null && $s->equals($stopState)) {
204         if ($s instanceof RuleStopState) {
219                 $removed = $calledRuleStack->contains($s->ruleIndex);
222                     $calledRuleStack->remove($s->ruleIndex);
238                         $calledRuleStack->add($s->ruleIndex);
247         foreach ($s->getTransitions() as $t) {