/** The key of the configuration. e.g. bool */
    String QUERY_DEFAULT_query_type = "query.default.query_type";

    /** The key of the configuration. e.g. 0.1 */
    String QUERY_DISMAX_tie_breaker = "query.dismax.tie_breaker";

    /** The key of the configuration. e.g.  */
    String QUERY_BOOL_minimum_should_match = "query.bool.minimum_should_match";

```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()]):