RedisIO.read() but executes multiple instances of the Redis query substituting each
element of a PCollection as key pattern.RedisConnectionConfiguration describes and wraps a connectionConfiguration to Redis
server or cluster.RedisIO.read().RedisIO.readKeyPatterns().PTransform to write to a Redis server.PTransform to write stream key pairs (https://redis.io/topics/streams-intro) to a
Redis server.withMaxLen(long) is used, set the "~" prefix to the MAXLEN value, indicating to
the server that it should use "close enough" trimming.RedisConnectionConfiguration and pass it to the builder.