Phan\Language\Type::isSubclassOf PHP Method

    public function isSubclassOf(CodeBase $code_base, Type $parent)
    {
        $fqsen = $this->asFQSEN();
        assert($fqsen instanceof FullyQualifiedClassName);
        $this_clazz = $code_base->getClassByFQSEN($fqsen);
        $parent_fqsen = $parent->asFQSEN();
        assert($parent_fqsen instanceof FullyQualifiedClassName);
        $parent_clazz = $code_base->getClassByFQSEN($parent_fqsen);
        return $this_clazz->isSubclassOf($code_base, $parent_clazz);
    }