PHPStan\Broker\Broker::getClass PHP Method

    public function getClass(string $className) : \PHPStan\Reflection\ClassReflection
    {
        if (!$this->hasClass($className)) {
            throw new \PHPStan\Broker\ClassNotFoundException($className);
        }
        if (!isset($this->classReflections[$className])) {
            $this->classReflections[$className] = $this->getClassFromReflection(new ReflectionClass($className));
        }
        return $this->classReflections[$className];
    }

 /**
  * @param \PhpParser\Node\Stmt\ClassMethod $node
  * @param \PHPStan\Analyser\Scope $scope
  * @return string[]
  */
 public function processNode(Node $node, Scope $scope) : array
 {
     if ($node->name !== '__construct') {
         return [];
     }
     $className = $scope->getClass();
     if ($className === null) {
         return [];
         // anonymous class
     }
     $classReflection = $this->broker->getClass($className);
     if ($classReflection->isInterface()) {
         return [];
     }
     if ($this->callsParentConstruct($node)) {
         if ($classReflection->getParentClass() === false) {
             return [sprintf('%s::__construct() calls parent constructor but does not extend any class.', $className)];
         }
         if ($this->getParentConstructorClass($classReflection) === false) {
             return [sprintf('%s::__construct() calls parent constructor but parent does not have one.', $className)];
         }
     } else {
         $parentClass = $this->getParentConstructorClass($classReflection);
         if ($parentClass !== false) {
             return [sprintf('%s::__construct() does not call parent constructor from %s.', $className, $parentClass->getName())];
         }
     }
     return [];
 }