<s>[INST] returns the undo change of the change performed by this operation . returns null if the change has n't been performed yet or if the change does n't provide a undo . concode_field_sep Change fChange concode_elem_sep Change fUndoChange concode_elem_sep boolean fChangeExecutionFailed concode_elem_sep IUndoManager fUndoManager concode_elem_sep boolean fChangeExecuted concode_elem_sep CreateChangeOperation fCreateChangeOperation concode_elem_sep ISchedulingRule fSchedulingRule concode_elem_sep RefactoringStatus fValidationStatus concode_elem_sep String fUndoName concode_field_sep RefactoringStatus getConditionCheckingStatus concode_elem_sep boolean changeExecutionFailed concode_elem_sep boolean createChange concode_elem_sep Change getChange concode_elem_sep void setUndoManager concode_elem_sep void run concode_elem_sep void executeChange concode_elem_sep void setSchedulingRule concode_elem_sep boolean changeExecuted concode_elem_sep RefactoringStatus getValidationStatus [/INST] Change function ( ) { return fUndoChange ; </s>