Test if native collection is allocated

Title. Is there a way to check if some native collection has been allocated or not?
Haven't found anything on a topic.

 

IsCreated property

 

Wouldn't that property just be for if the object is not null? What about if the objects within a native collection have not been initialized? (Sorry if it sounds dumb, I have never used that property before)

Like for example

NativeArray<SomeStruct> someStructs = new NativeArray<SomeStruct>(length, Allocator.Temp, NativeArrayOptions.UninitializedMemory);

Is it possible to check all obejcts in the array if they have been initialized within the memory? or it has to be done one-by-one?

 

If you initialize native collection, IsCreated say true, if you just declare it's say false.
Also all native collections is structs, it's value type. Struct cannot be null, and a struct variable cannot be assigned null unless the variable is declared as a nullable type.