presto-main/src/main/java/io/prestosql/sql/planner/TranslationMap.java/TranslationMap/getLambdaDeclarationToSymbolMap
class TranslationMap:    public Map<NodeRef<LambdaArgumentDeclaration>, Symbol> getLambdaDeclarationToSymbolMap()
    {
        return lambdaDeclarationToSymbolMap;
    }