Registry types inconsistency

Encoder generate_latest (for example) accepts registry of CollectorRegistry type but it doesn't accept registry of RestrictedRegistry type so it is not consistent. I guess RestrictedRegistry class should inherit CollectorRegistry class because instance of it can be passed to encoders (maybe not only encoders).

Another option is to inherit RestrictedRegistry class from Collector class because CollectorRegistry is inherited from this class, but then anything that accepts CollectorRegistry type should be changed to accept Collector type.

generate_latest エンコーダーのエントリーポイントから始め、CollectorRegistry の処理を RestrictedRegistry と比較してください。レジストリ型の意図された関係を特定し、選択した設計によって、CollectorRegistry が期待されるあらゆる場所で RestrictedRegistry が受け入れ可能になることを確認してください。