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Mappings applying to intermediate components such as functions, filters, if-else and other components are not shown in the main view (although they can be displayed for the selected item using the Show source mapping trail view option).
If you prefer, you can include the mappings applying to intermediate components in the main view by selecting the Show mappings for intermediate components view option. In the following illustration you can see that the mappings associated with the Function [multiply] are now included in the list:
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