public java.util.List<String> getDirectoryIds() {
        if (directoryIds == null) {
            directoryIds = new com.amazonaws.internal.SdkInternalList<String>();
        }
        return directoryIds;
    }
<p>
A list of identifiers of the directories for which to obtain the information. If this member is null, all
directories that belong to the current account are returned.
</p>
<p>
An empty list results in an <code>InvalidParameterException</code> being thrown.
</p>

@return A list of identifiers of the directories for which to obtain the information. If this member is null, all
        directories that belong to the current account are returned.</p>
        <p>
        An empty list results in an <code>InvalidParameterException</code> being thrown.
aws-java-sdk-directory/src/main/java/com/amazonaws/services/directory/model/DescribeDirectoriesRequest.java