SSIS: Curious: why is the last parameter in FireInformation method a ref bool?

I'm currently working on a SSIS package and after the 80th time using FireInformation inside a Script Task, I have to wonder: why would the method require yo开发者_如何转开发u to pass in a ref boolean as its last parameter? The documentation doesn't state anything about how you should respond to the value once the method returns. Am I missing something here?

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The run-time engine has the ability to modify the “fireAgain” parameter and prevent the further firing of events. In order to do this, the run-time must have access to modify the variable. It can only do this if the parameter is passed by ref.

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It is fireAgain parameter.

Because firing of an event may be expensive, the run-time engine provides a mechanism for suppressing events that you are not interested in. Every event firing method has a FireAgain parameter. If the value of this variable is false, after the method returns, the caller will not fire this event again for the duration of the current execution. Source