金蝶云·星空|反写插件缺少引用和USING ,AfterCommitAmountEventArgs

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public override void BeforeWriteBack(BeforeWriteBackEventArgs e)

public override void AfterCommitAmount(AfterCommitAmountEventArgs e)
BeforeWriteBackEventArgs 和AfterCommitAmountEventArgs 报错缺少引用
请问应该引用什么 using什么?