VersionedXcm is not created with versioned_type

[franciscoaguirre]

The VersionedXcm type is defined like so:

pub enum VersionedXcm<RuntimeCall> {
	#[codec(index = 2)]
	V2(v2::Xcm<RuntimeCall>),
	#[codec(index = 3)]
	V3(v3::Xcm<RuntimeCall>),
	#[codec(index = 4)]
	V4(v4::Xcm<RuntimeCall>),
}

meanwhile, all other versioned types use the versioned_type macro to get some automatic functionality.

Is there a reason for this? Should we just use the macro for this type as well?

[bkontur]

My guess is that it's because of the type parameter RuntimeCall - pub enum VersionedXcm<RuntimeCall>, and it seems like the only difference in the derive stuff is #[scale_info(bounds(), skip_type_params(RuntimeCall))].

[franciscoaguirre]

True. If there was a way to put that inside of the macro I think we'd save ourselves from some duplication.