def fetch[F[_] : ConcurrentEffect : Par](id: I): F[Option[A]]
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ВсеПрибалтикаУкраинаБелоруссияМолдавияЗакавказьеСредняя Азия，这一点在PDF资料中也有详细论述
EXCISE → surgically project out guardrail directions (norm-preserving)
src/Moongate.Core: shared low-level utilities.，推荐阅读搜狗输入法获取更多信息