org.eclipse.core.commands.operations
Interfaces 
IAdvancedUndoableOperation
ICompositeOperation
IOperationApprover
IOperationHistory
IOperationHistoryListener
IUndoableOperation
IUndoContext
Classes 
AbstractOperation
DefaultOperationHistory
LinearUndoEnforcer
LinearUndoViolationDetector
ObjectUndoContext
OperationHistoryEvent
OperationHistoryFactory
OperationStatus
TriggeredOperations
UndoContext