John Maguire cfe4d59938
[NET-7265] Panic when passing an incorrect type to the data fetcher for gatewayproxy (#20238)
* panic when passing an incorrect type to the data fetcher

* Add assertions for sidecarproxy datafetcher as well

* rename assertion function

* Add in comments to ensure devs know about potential panics for using
invalid types

* fix method call
2024-01-24 14:16:56 -05:00
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