在派生类中重写后，异步地将消息从源块传递至该目标块。

When overridden in a derived class, asynchronously passes a message from a source block to this target block.

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要将代码块传递为委托参数，创建匿名方法则是唯一的方法。

Creating anonymous methods is essentially a way to pass a code block as a delegate parameter.

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此脚本可以是在我们将数据块传递给管道进行数据摄入之前需要的任何内容。

This script can be anything we want before the chunk is passed to the pipelines for ingestion.

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