Bug 294303 [Markers] 'Queuing Viewer Updates' in Problems view
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerUpdateJob.java
}
	/**
	 * @return Returns if the a clean is requested.
	 */
	boolean isClean() {
		return clean;
	}
	/**
	 * Request a clean
	 */
	void setClean() {
		this.clean = true;
	}
	/**
	 * @return Returns true if collecting markers incrementally.
	 */
	boolean isIncremental() {
		return incremental;
	}
	/**
	 * @return last update time
	 */
	 long getLastUpdateTime() {
		return lastUpdateTime;
	}
}
/**
 * The SortingJob is used to resort the existing markers. Once the sorting is
 * complete it schedules the an UI update
 *