public void setAppIdClientRegex(String appIdClientRegex) {
        this.appIdClientRegex = appIdClientRegex;
    }
<p>
A regular expression for validating the incoming Amazon Cognito user pools app client ID. If this value isn't
set, no filtering is applied.
</p>

@param appIdClientRegex
       A regular expression for validating the incoming Amazon Cognito user pools app client ID. If this value
       isn't set, no filtering is applied.
aws-java-sdk-securityhub/src/main/java/com/amazonaws/services/securityhub/model/AwsAppSyncGraphQlApiUserPoolConfigDetails.java