Bug 67726 Refactoring fails if validate edit returns a cancel status [refactoring]
org.eclipse.ltk.core.refactoring/src/org/eclipse/ltk/core/refactoring/RefactoringStatus.java
* Returns <code>true</code> if the current severity is <code>
	 * FATAL</code>, <code>ERROR</code> or <code>WARNING</code>.
	 * 
	 * @return <code>true</code> if the current severity is <code>
	 *  FATAL</code>, <code>ERROR</code> or <code>WARNING</code>; 
	 *  otherwise <code>false</code> is returned
	 */
	public boolean hasWarning() {
		return fSeverity == FATAL || fSeverity == ERROR || fSeverity == WARNING;
	}
	/**
	 * Returns <code>true</code> if the current severity is <code>
	 * FATAL</code>, <code>ERROR</code>, <code>WARNING</code> or 
	 * <code>INFO</code>.
	 * 
	 * @return <code>true</code> if the current severity is <code>
	 *  FATAL</code>, <code>ERROR</code>, <code>WARNING</code> or 
	 *  <code>INFO</code>; otherwise <code>false</code> is returned
	 */
	public boolean hasInfo() {
		return fSeverity == FATAL || fSeverity == ERROR || fSeverity == WARNING || fSeverity == INFO;
	}
	/*
	 * (non java-doc) 
	 * for debugging only
	 */
	public String toString() {
		StringBuffer buff= new StringBuffer();
		buff.append("<") 
			.append(getSeverityString(fSeverity)).append("\n");