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<     database, name, duration, replication, default=False, **client_args
---
>     database, name, duration, replication, shard_duration, default=False, **client_args
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<     client.create_retention_policy(name, duration, replication, database, default)
---
>     client.create_retention_policy(name, duration, replication, database, default, shard_duration)
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<     database, name, duration, replication, default=False, **client_args
---
>     database, name, duration, replication, shard_duration, default=False, **client_args
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<     client.alter_retention_policy(name, database, duration, replication, default)
---
>     client.alter_retention_policy(name, database, duration, replication, default, shard_duration)