```python
from typing import Annotated

from fastapi import FastAPI, Header
from pydantic import BaseModel

app = FastAPI()


class CommonHeaders(BaseModel):
    host: str
    save_data: bool
    if_modified_since: str | None = None
    traceparent: str | None = None
    x_tag: list[str] = []


@app.get("/items/")
async def read_items(headers: Annotated[CommonHeaders, Header()]):

void check(ListMap, String); public static scala.Tuple2 id(ListMap, String, String); private static scala.Option getOrNone(ListMap, Object); public static scala.Tuple2 ids(ListMap, String, scala.collection.immutable.List); public final scala.Tuple2 bool(ListMap, String, boolean); public final scala.collection.immutable.List toFiles(scala.collection.immutable.List); public static java.io.File toFile(String); public final scala.Tuple2 file(ListMap, String, java.io.File); public final scala.Tuple2 optfile(ListMap,...