Is it possible to disallow/skip certain enum variations?

[srfsh]

My use case requires me to skip a certain enum variation to be selected. It is the gRPC's "unspecified" values if you're familiar. They are used as the default value if not specified by the other end. It basically works like a null value in JSON, meaning if the value is null or really isn't provided, it is considered null.

I think my use case is quite applicable to others, as it is often the first choice to use the first variation of an enum for a "zero value". So my question is whether this is possible or not and if I can workaround it.

[cksac]

with version 2.10.0

#[derive(Eq, PartialEq, Debug, Dummy)]
enum MyEnum {
    One,
    #[dummy(skip)]
    Two,
}