getActualType example

        if ($varType instanceof ConstExpression) {
            // It's safer to fall back to other extractors here, as resolving const types correctly is not easy at the moment             return [];
        }

        $types = [];
        $nullable = false;

        if ($varType instanceof Nullable) {
            $nullable = true;
            $varType = $varType->getActualType();
        }

        if (!$varType instanceof Compound) {
            if ($varType instanceof Null_) {
                $nullable = true;
            }

            $type = $this->createType($varType, $nullable);
            if (null !== $type) {
                $types[] = $type;
            }