276     protected $mergeCache;  variable in Antlr\\Antlr4\\Runtime\\Atn\\ParserATNSimulator
416             $this->mergeCache = null; // wack cache after each prediction
896         if ($this->mergeCache === null) {
897             $this->mergeCache = new DoubleKeyMap();
946                     $intermediate->add($cfg, $this->mergeCache);
1030                 $reach->add($lValue, $this->mergeCache);
1075                 $result->add($config, $this->mergeCache);
1085                     $result->add(new ATNConfig($config, $endOfRuleState), $this->mergeCache);
1272                     $this->mergeCache
1275                 $configSet->add($config, $this->mergeCache);
1296             $configSet->add($config, $this->mergeCache);
1641                                 $this->mergeCache
1694                 $configs->add($config, $this->mergeCache);
1727             $configs->add($config, $this->mergeCache);