Sequencer is a trait that provides a method to returns a Stream over a list of items from AWS
that are normally returned in chunks by repeated calls to the AWS APIs.
case classStatement(effect: Effect, actions: Seq[Action], resources: Seq[Resource], id: Option[String] = None, conditions: Seq[Condition] = Nil, principals: Seq[Principal] = Nil) extends com.amazonaws.auth.policy.Statement with Product with Serializable