Bug 89031 [Undo/Redo] IWorkbench#getOperationSupport() marked experimental
IWorkbench#getOperationSupport() marked experimental
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/DefaultOperationHistory.java
*/
    public static boolean DEBUG_OPERATION_HISTORY_NOTIFICATION = false;
	
	/**
	 * This flag can be set to <code>true</code> if the history should print
	 * information to <code>System.out</code> whenever an unexpected condition
	 * arises.
	 */
    public static boolean DEBUG_OPERATION_HISTORY_UNEXPECTED = false;
	
	/**
	 * This flag can be set to <code>true</code> if the history should print
	 * information to <code>System.out</code> whenever an undo context is disposed.
	 */
    public static boolean DEBUG_OPERATION_HISTORY_DISPOSE = false;
	
	/**
	 * This flag can be set to <code>true</code> if the history should print
	 * information to <code>System.out</code> during the open/close sequence.
	 */
    public static boolean DEBUG_OPERATION_HISTORY_OPENOPERATION = false;
	/**
	 * This flag can be set to <code>true</code> if the history should print
	 * information to <code>System.out</code> whenever an operation is not
	 * approved.
	 */
    public static boolean DEBUG_OPERATION_HISTORY_APPROVAL = false;
	
	protected static final int DEFAULT_LIMIT = 20;