public void setAccountId(String accountId) {
        this.accountId = accountId;
    }
<p>
The unique identifier for the Amazon Web Services account that owns the bucket.
</p>

@param accountId
       The unique identifier for the Amazon Web Services account that owns the bucket.
aws-java-sdk-macie2/src/main/java/com/amazonaws/services/macie2/model/BucketMetadata.java