def "generates a node backed view class for an interface"() {
        expect:
        def impl = newNodeBackedInstance(SomeType)
        impl instanceof SomeType
    }

    def "generates a view class for an interface"() {
        expect:
        def impl = newSimpleInstance(SomeType)
        impl instanceof SomeType
    }

    def "generates a view class for an interface with type parameters"() {
        when:

    def "tests output of missingValueMessage"() {
        when:
        render(missingValueMessage {
            type('SomeType')
            property('someProperty')
        })

        then:
        outputEquals """
Type 'SomeType' property 'someProperty' doesn't have a configured value.

Reason: This property isn't marked as optional and no value has been configured.

Possible solutions:

        when:
        def publishArtifact = publishArtifactNotationParser.parseNotation(file: file, type: 'someType', builtBy: task)

        then:
        publishArtifact instanceof DefaultPublishArtifact
        publishArtifact.file == file
        publishArtifact.type == 'someType'
        publishArtifact.name == 'some-file'
        publishArtifact.extension == 'zip'

    }

    def "can serialize/deserialize isolated Attribute values"() {
        Attribute attr1 = Attribute.of("foo", String.class)
        Attribute attr2 = Attribute.of("bar", SomeType.class)
        Isolatable<?>[] isolatables = [isolatableFactory.isolate(attr1), isolatableFactory.isolate(attr2)]

        when:
        serialize(isolatables)

        and:

    def "renders sensible value for node whose toString() method returns null"() {
        given:
        buildFile << """
            @Managed abstract class SomeType {
                String toString() { null }
            }
            model {
                something(SomeType)
            }
        """.stripIndent()

        when:
        succeeds 'model'

        then:

            <title>
                <classname>SomeType</classname>
                <literal>readWriteProperty</literal>
            </title>
            <para>comment</para>
        </section>
        <section id="readOnlyProperty" role="detail">
            <title><classname>SomeType</classname> <literal>readOnlyProperty</literal> (read-only)</title>
            <para>comment</para>

* 🚨 Avoid using `Optional[SomeType]`
* Instead ✨ **use `Union[SomeType, None]`** ✨.

Both are equivalent and underneath they are the same, but I would recommend `Union` instead of `Optional` because the word "**optional**" would seem to imply that the value is optional, and it actually means "it can be `None`", even if it's not optional and is still required.

I think `Union[SomeType, None]` is more explicit about what it means.

🚥 👆 ⚙️ 🐍 ⏬ 🔛 3️⃣.1️⃣0️⃣, 📥 💁‍♂ ⚪️➡️ 👇 📶 **🤔** ☝ 🎑:

* 👶 ❎ ⚙️ `Optional[SomeType]`
* ↩️ 👶 **⚙️ `Union[SomeType, None]`** 👶.

👯‍♂️ 🌓 & 🔘 👫 🎏, ✋️ 👤 🔜 👍 `Union` ↩️ `Optional` ↩️ 🔤 "**📦**" 🔜 😑 🔑 👈 💲 📦, & ⚫️ 🤙 ⛓ "⚫️ 💪 `None`", 🚥 ⚫️ 🚫 📦 & ✔.

👤 💭 `Union[SomeType, None]` 🌖 🔑 🔃 ⚫️❔ ⚫️ ⛓.

⚫️ 🔃 🔤 & 📛. ✋️ 👈 🔤 💪 📉 ❔ 👆 & 👆 🤽‍♂ 💭 🔃 📟.

* 🚨 `Optional[SomeType]` ব্যবহার এড়িয়ে চলুন।
* এর পরিবর্তে ✨ **`Union[SomeType, None]` ব্যবহার করুন** ✨।

উভয়ই সমতুল্য এবং মূলে একই, কিন্তু আমি `Union`-এর পক্ষে সুপারিশ করব কারণ "**অপশনাল**" শব্দটি মনে হতে পারে যে মানটি ঐচ্ছিক,অথচ এটি আসলে মানে "এটি হতে পারে `None`", এমনকি যদি এটি ঐচ্ছিক না হয়েও আবশ্যিক হয়।

আমি মনে করি `Union[SomeType, None]` এর অর্থ আরও স্পষ্টভাবে প্রকাশ করে।

* 🚨 Tránh sử dụng `Optional[SomeType]`
* Thay vào đó ✨ **sử dụng `Union[SomeType, None]`** ✨.

Cả hai là tương đương và bên dưới chúng giống nhau, nhưng tôi sẽ đễ xuất `Union` thay cho `Optional` vì từ "**tùy chọn**" có vẻ ngầm định giá trị là tùy chọn, và nó thực sự có nghĩa rằng "nó có thể là `None`", do đó nó không phải là tùy chọn và nó vẫn được yêu cầu.

Tôi nghĩ `Union[SomeType, None]` là rõ ràng hơn về ý nghĩa của nó.