In the bottom half of the editor, drop the message logger mediation primitive onto the canvas and wire the message flow so that each message goes through the logger, as shown in Figure 10.

在编辑器的下半部分，将Message Logger中介元素拖放到画布并连接消息流，以便每条消息都经过日志程序，如图10所示。

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In the Request flow, drag a MessageElementSetter primitive onto the canvas and wire the input primitive to its input terminal and its output terminal to the callout node.

在Request flow中，把一个MessageElementSetter primitive拖到画布中，把Input primitive连接到它的输入端，把它的输出端连接到callout节点。

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