Does `TMap<K, V*>::FindOrAdd` return null when key not found?

Development Programming & Scripting C++
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If I have a TMap with a pointer value type:

   TMap<FKey, UMyObject*> MyMap;

and I call FindOrAdd for a key not present in the map:

    UMyObject*& MyObject = MyMap.FindOrAdd(K); // not found

…is the returned pointer guaranteed to be null? or is it uninitialized?

(The docs say…

if none exists, adds a value using the default constructor.

…but a pointer does not have constructors - default or otherwise.)