public void setUpdateActivities(java.util.Collection<UpdateInfoEntry> updateActivities) {
        if (updateActivities == null) {
            this.updateActivities = null;
            return;
        }

        this.updateActivities = new com.amazonaws.internal.SdkInternalList<UpdateInfoEntry>(updateActivities);
    }
<p>
The list of update activities on a directory for the requested update type.
</p>

@param updateActivities
       The list of update activities on a directory for the requested update type.
aws-java-sdk-directory/src/main/java/com/amazonaws/services/directory/model/DescribeUpdateDirectoryResult.java