// 'condition' will always be invoked at least once.
//
// Some intervals may be missed if the condition takes too long or the time
// window is too short.
//
// If you want to Poll something forever, see PollInfinite.
//
// Deprecated: This method does not return errors from context, use PollUntilContextTimeout.
// Note that the new method will no longer return ErrWaitTimeout and instead return errors

                contextualLabel == 'Type \'MyTask\' method \'notAGetter()\' should not be annotated with: @Input'
                details == 'Input/Output annotations are ignored if they are placed on something else than a getter'
                solutions == [
                    'Remove the annotations',
                    'Rename the method',
                ]

Ein „**Callable**“ in Python ist etwas, das wie eine Funktion aufgerufen werden kann („to call“).

Wenn Sie also ein Objekt `something` haben (das möglicherweise _keine_ Funktion ist) und Sie es wie folgt aufrufen (ausführen) können:

```Python
something()
```

oder

```Python
something(some_argument, some_keyword_argument="foo")
```

dann ist das ein „Callable“ (ein „Aufrufbares“).

## Klassen als Abhängigkeiten

    assertEquals(
        "text/plain; something=\"cr@zy\"; something-else=\"crazy with spaces\";"
            + " and-another-thing=\"\"; normal-thing=foo",
        MediaType.create("text", "plain")
            .withParameter("something", "cr@zy")
            .withParameter("something-else", "crazy with spaces")
            .withParameter("and-another-thing", "")

            import ${FileCollectionFactory.name}

            class CustomTask extends DefaultTask {
                @Optional @$annotation.simpleName input
                @TaskAction void doSomething() {
                    def fileCollectionFactory = services.get(FileCollectionFactory)
                    GetInputFilesVisitor visitor = new GetInputFilesVisitor("ownerName", fileCollectionFactory)

{!../../../docs_src/python_types/tutorial009.py!}
```

⚙️ `Optional[str]` ↩️ `str` 🔜 ➡️ 👨‍🎨 ℹ 👆 🔍 ❌ 🌐❔ 👆 💪 🤔 👈 💲 🕧 `str`, 🕐❔ ⚫️ 💪 🤙 `None` 💁‍♂️.

`Optional[Something]` 🤙 ⌨ `Union[Something, None]`, 👫 🌓.

👉 ⛓ 👈 🐍 3️⃣.1️⃣0️⃣, 👆 💪 ⚙️ `Something | None`:

=== "🐍 3️⃣.6️⃣ & 🔛"

    ```Python hl_lines="1  4"
    {!> ../../../docs_src/python_types/tutorial009.py!}
    ```

        gradleScript.parentFile.createDir()
        gradleScript.write('something')
        TestFile gradleLauncherJar = explodedZipDir.file('gradle-0.9/lib/gradle-launcher-0.9.jar')
        gradleLauncherJar.parentFile.createDir()
        gradleLauncherJar.write('something')
        explodedZipDir.zipTo(new TestFile(zipDestination))
        explodedZipDir.deleteDir();
    }

	{"comment only", "{{/* comment */}}", true},
	{"definition", `{{define "x"}}something{{end}}`, true},
	{"definitions and space", "{{define `x`}}something{{end}}\n\n{{define `y`}}something{{end}}\n\n", true},
	{"definitions and text", "{{define `x`}}something{{end}}\nx\n{{define `y`}}something{{end}}\ny\n", false},
	{"definition and action", "{{define `x`}}something{{end}}{{if 3}}foo{{end}}", false},
}

func TestIsEmpty(t *testing.T) {

        closureOf<MutableList<Int>> { add(42) }.call(list)
        assertEquals(42, list.first())
    }

    @Test
    fun `can use closure with single nullable argument call`() {
        var passedIntoClosure: Any? = "Something non null"
        closureOf<Any?> { passedIntoClosure = this }.call(null)
        assertNull(passedIntoClosure)
    }

    @Test
    fun `can use closure with delegate call`() {
        val list = arrayListOf<Int>()

                File outputFile

                @Optional
                @OutputFile
                File secondaryOutputFile

                @TaskAction
                void doSomething() {
                    outputFile.text = inputFile.text
                    if (secondaryOutputFile != null) {
                        secondaryOutputFile.text = "secondary"
                    }
                }