如果我有集群详细信息，如何为特定集群的describeDBInstances形成过滤器？如果我想通过“ db-cluster-id”进行过滤，则不确定如何制定Filter对象
过滤器说明如下：
db-cluster-id - Accepts DB cluster identifiers and DB cluster Amazon Resource Names (ARNs). The results list will only include information about the DB instances associated with the DB clusters identified by these ARNs.