What will be the output of the following FastAPI code when accessing /items/3?

What will be the output of the following FastAPI code when accessing /items/3?

from fastapi import FastAPI, Depends

app = FastAPI()

def common_parameters(q: str = None):
    return {"q": q}

@app.get("/items/{item_id}")
def read_item(item_id: int, commons: dict = Depends(common_parameters)):
    return {"item_id": item_id, **commons}