Phan\Language\Element\Clazz::hasParentType PHP Method

    public function hasParentType() : bool
    {
        return !empty($this->parent_type);
    }

 /**
  * Check to see if the given Clazz is a duplicate
  *
  * @return null
  */
 public static function analyzeParentConstructorCalled(CodeBase $code_base, Clazz $clazz)
 {
     // Only look at classes configured to require a call
     // to its parent constructor
     if (!in_array($clazz->getName(), Config::get()->parent_constructor_required)) {
         return;
     }
     // Don't worry about internal classes
     if ($clazz->isInternal()) {
         return;
     }
     // Don't worry if there's no parent class
     if (!$clazz->hasParentType()) {
         return;
     }
     if (!$code_base->hasClassWithFQSEN($clazz->getParentClassFQSEN())) {
         // This is an error, but its caught elsewhere. We'll
         // just roll through looking for other errors
         return;
     }
     $parent_clazz = $code_base->getClassByFQSEN($clazz->getParentClassFQSEN());
     if (!$parent_clazz->isAbstract() && !$clazz->getIsParentConstructorCalled()) {
         Issue::maybeEmit($code_base, $clazz->getContext(), Issue::TypeParentConstructorCalled, $clazz->getFileRef()->getLineNumberStart(), (string) $clazz->getFQSEN(), (string) $parent_clazz->getFQSEN());
     }
 }