| 摘要 |
A system, method and media for performing a composite task, comprising: determining an undo task for each subtask in a plurality of subtasks for the composite task; performing each one of the plurality of subtasks; performing the associated undo task for each subtask that was performed if the performing of any subtask in the plurality of subtasks fails. This abstract is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects and objects of the invention can be obtained from a review of the specification, the figures and the claims.
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