import typing


def _explode(line: str) -> typing.Tuple[str, str]:
    """
    Explodes a properties config line into a key value pair
    and returns that as a tuple. Lines without values are
    returned with an empty string as the value.
    """
    parts = line.split('=', 1)
    key = parts[0].strip()
    value = parts[1].strip() if len(parts) > 1 else ''
    return key, value