If I want to wrap a macro around offset_of!‘s nested form, e.g. offset_of!(Foo, x.y.VariantA.0), what should x.y.VariantA.0 get parsed as in syn terms (e.g. which of these https://docs.rs/syn/latest/syn/index.html#structs)?

The closest seems to be ExprField, but afaict that represents just a single field, not the sequence.

<filler text for 300 char requirement; I feel that my question is fully specified>