Bug 161738 [Undo] - API - promote ability to quietly compute status to operations API
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/AbstractWorkspaceOperation.java
}
		return new Status(IStatus.ERROR, IDEWorkbenchPlugin.IDE_WORKBENCH,
				OperationStatus.OPERATION_INVALID, statusMessage, null);
	}
	/**
	 * Return a warning status describing the warning state of an operation
	 * using the provided message and code.
	 * 
	 * @param message
	 *            the message to be used in the status, or <code>null</code>
	 *            if a generic message should be used
	 * @param code
	 *            the integer code to be assigned to the status
	 * @return the warning status
	 */
	protected IStatus getWarningStatus(String message, int code) {
		String statusMessage = message;
		if (statusMessage == null) {
			statusMessage = NLS
					.bind(
							UndoMessages.AbstractWorkspaceOperation_GenericWarningMessage,
							getLabel());
		}
		return new Status(IStatus.WARNING, IDEWorkbenchPlugin.IDE_WORKBENCH,
				code, statusMessage, null);
	}
	/**
	 * Return whether the resources known by this operation currently exist.
	 * 
	 * @return <code>true</code> if there are existing resources and