src/Reflection/Adapter/ReflectionType.php
public function isBuiltin() : bool
    {
        $type = (string) $this->betterReflectionType;

        if ($type === 'self' || $type === 'parent') {
            return false;
        }

        return $this->betterReflectionType->isBuiltin();
    }
public function isBuiltin() : bool
    {
        $type = (string) $this->betterReflectionType;

        if ($type === 'self' || $type === 'parent') {
            return false;
        }

        return $this->betterReflectionType->isBuiltin();
    }
{@inheritDoc}