pub trait Tag<'a> {
type TagType: StaticType + FromValue<'a> + ToSendValue + Send + Sync;
fn tag_name<'b>() -> &'b str;
}
pub trait Tag<'a> {
type TagType: StaticType + FromValue<'a> + ToSendValue + Send + Sync;
fn tag_name<'b>() -> &'b str;
}