public String getDirectoryId() {
        return this.directoryId;
    }
<p>
The Directory ID of an Directory Service directory that will publish status messages to an Amazon SNS topic.
</p>

@return The Directory ID of an Directory Service directory that will publish status messages to an Amazon SNS
        topic.
aws-java-sdk-directory/src/main/java/com/amazonaws/services/directory/model/EventTopic.java