import io
import csv


def roamingzone_csv() -> io.StringIO:
    """
    Generates a placeholder RoamingZone.csv
    """

    header = [
        "No.",
        "Name",
        "Roaming Channel Member",
        "",
    ]

    sio = io.StringIO()
    writer = csv.writer(sio, dialect="d878uvii")
    writer.writerow(header)

    return sio