Given this FastAPI endpoint, what will be the output if two files named 'file1.txt' and 'file2.txt' are uploaded?

Given this FastAPI endpoint, what will be the output if two files named 'file1.txt' and 'file2.txt' are uploaded?

from fastapi import FastAPI, UploadFile, File
from typing import List

app = FastAPI()

@app.post('/upload')
async def upload(files: List[UploadFile] = File(...)):
    return {'filenames': [file.filename for file in files]}