Interface – handling removed enum extension value
Important
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| Enabled for | Public preview | General availability |
|---|---|---|
| Admins, makers, marketers, or analysts, automatically | 
Feb 1, 2021 |
Apr 1, 2021 |
Business value
Add resilience in interface implementations when extensible enum values are removed due to uninstalling extension declaring value.
Feature details
Enums can be used to select an interface implementation. However, due to the pluggable nature, an enum extension (and its corresponding interface implementation) could have been uninstalled from the tenant, while the setting for the enum is kept, now pointing to an "unknown" value. Instead of having app code add the validation logic for handling this scenario, the platform should catch when a non-valid enum value is provided, and allow for an extensible way to handle that.
This is related to, but not the same as, fallback to default value (which is used when no enum value is provided).