public ModifyActivityStreamResult withKmsKeyId(String kmsKeyId) {
        setKmsKeyId(kmsKeyId);
        return this;
    }
<p>
The Amazon Web Services KMS key identifier for encryption of messages in the database activity stream.
</p>

@param kmsKeyId
       The Amazon Web Services KMS key identifier for encryption of messages in the database activity stream.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/ModifyActivityStreamResult.java