[Question] Is "REGISTRY" meant to be a decorator for "Collectors"?

Browsing through the code I've found a function called write_to_textfile in the exposition module. This function signature looks like this:

def write_to_textfile(path, registry):
    """Write metrics to the given path.
    pass

If you read the implementation of the function, turns out the expectation is not really a registry but instead anything that implements (something like an interface) the .collect() method.

Is that by design?

If so, would it be welcomed the addition of type hints throughout the code? I would be happy to add them and create a PR.

exposition モジュールの write_to_textfile から始め、registry パラメーターを issue で説明されている .collect() の動作と比較してください。変更を加える前に、Python コードベース全体で型ヒントが必要かどうかを判断してください。実施するには、合意されたスコープとメンテナーの判断が必要です。