Back to the tutorial : [How to add a new REST API Mapping to an existing REST service]

How to add a new REST API Mapping to an existing REST service

In the Var table in the middle of the editor:Click the [+] button to add a new variable to the table. This variable is automatically called Var1.Click the Expression field of this Var1 variable to display the [...] button.Click the [...] button to open the Expression Builder editor and build the variable.

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