Quando escrever o código para documentar um callback, pode ser útil imaginar que você é aquele *desenvolvedor externo*. E que você está atualmente implementando a *API externa*, não *sua API*.

Adotar temporariamente esse ponto de vista (do *desenvolvedor externo*) pode ajudar a sentir que é mais óbvio onde colocar os parâmetros, o modelo Pydantic para o corpo, para a resposta, etc. para essa *API externa*.

///

### Criar um `APIRouter` para o callback

    } // -- Object getConfiguration()

    /**
     * Method getGoals.
     *
     * @return List
     */
    public java.util.List<String> getGoals() {
        if (this.goals == null) {
            this.goals = new java.util.ArrayList<String>();
        }

        return this.goals;
    } // -- java.util.List<String> getGoals()

    /**
     * Method removeGoal.
     *
     * @param string a string object.

        Collection<ModelProblem> list = new ArrayList<>();
        for (ModelProblem item : problems) {
            list.add(item);
        }
        for (ModelProblem item : result.getProblems()) {
            list.add(item);
        }
        return new Result<>(result.hasErrors() || hasErrors(problems), result.get(), list);
    }

    }

    public static List<Map<String, String>> getEnvItems() {
        final List<Map<String, String>> itemList = new ArrayList<>();
        for (final Map.Entry<String, String> entry : System.getenv().entrySet()) {
            itemList.add(createItem(entry.getKey(), entry.getValue()));
        }
        return itemList;
    }

    public static List<Map<String, String>> getPropItems() {

from typing import List

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class RecursiveItem(BaseModel):
    sub_items: List["RecursiveItem"] = []
    name: str


RecursiveItem.update_forward_refs()


class RecursiveSubitemInSubmodel(BaseModel):
    sub_items2: List["RecursiveItemViaSubmodel"] = []
    name: str


class RecursiveItemViaSubmodel(BaseModel):

        List<JApiCmpWorkerAction.Archive> baseline = !oldArchives.isEmpty() ? toArchives(oldArchives) : inferArchives(getOldClasspath());
        List<JApiCmpWorkerAction.Archive> current = !newArchives.isEmpty() ? toArchives(newArchives) : inferArchives(getNewClasspath());
        execForNewGradle(baseline, current);
    }

    }
    // ------------------------------------------------------------------------
    public List<MetadataGraphEdge> getEdgesBetween(MetadataGraphVertex vFrom, MetadataGraphVertex vTo) {
        List<MetadataGraphEdge> edges = getIncidentEdges(vTo);
        if (edges == null || edges.isEmpty()) {
            return null;
        }

        List<MetadataGraphEdge> res = new ArrayList<>(edges.size());

✋️ 🐍 ✔️ 🎯 🌌 📣 📇 ⏮️ 🔗 🆎, ⚖️ "🆎 🔢":

### 🗄 ⌨ `List`

🐍 3️⃣.9️⃣ & 🔛 👆 💪 ⚙️ 🐩 `list` 📣 👫 🆎 ✍ 👥 🔜 👀 🔛. 👶

✋️ 🐍 ⏬ ⏭ 3️⃣.9️⃣ (3️⃣.6️⃣ & 🔛), 👆 🥇 💪 🗄 `List` ⚪️➡️ 🐩 🐍 `typing` 🕹:

```Python hl_lines="1"
{!> ../../docs_src/body_nested_models/tutorial002.py!}
```

### 📣 `list` ⏮️ 🆎 🔢

📣 🆎 👈 ✔️ 🆎 🔢 (🔗 🆎), 💖 `list`, `dict`, `tuple`:

    private static final long serialVersionUID = 1L;

    private final List<Pair<String, String>> searchFieldLogList = new ArrayList<>();

    private final List<Pair<String, String>> headerList = new ArrayList<>();

    private OptionalEntity<UserInfo> userInfo;

    private Map<String, Object> fields;

    private final List<Map<String, Object>> documentList = new ArrayList<>();

    @Override

    resolve_files(items=config.extra_javascript, files=files, config=config)
    return files


def generate_renamed_section_items(
    items: List[Union[Page, Section, Link]], *, config: MkDocsConfig
) -> List[Union[Page, Section, Link]]:
    new_items: List[Union[Page, Section, Link]] = []
    for item in items:
        if isinstance(item, Section):
            new_title = item.title