Issue with Map types in CognitoUserPoolPreTokenGenerationEventV2 -> GroupOverrideDetails

According to my support representative and the documentation https://docs.aws.amazon.com/cognito/latest/developerguide/user-pool-lambda-pre-token-generation.html#aws-lambda-triggers-pre-token-generation-example-version-2-overview, the response should return list types for groupsToOverride and iamRolesToOverride even when I use V2 pre token generation, not Map. My experiences with Map here is that cognito fails when I return an object generated by the current java sdk with map here instead of a list, so I suspect that the SDK uses the wrong types here. Thank you in advance for looking into my issue!

首先定位 CognitoUserPoolPreTokenGenerationEventV2 及其 GroupOverrideDetails 定义，然后将 groupsToOverride 和 iamRolesToOverride 的类型与 issue 中链接的 AWS 文档进行比较。当 Java 事件模型将响应字段表示为文档所述的列表类型，并且有覆盖展示生成的响应结构时，即表示完成。

由索引模型根据 Issue 内容生成。