syntax_data: {"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:             if let TrackElem::Variant(..) | TrackElem::Discriminant = elem {
context_before:             let sub = self.apply(index, elem);
context_after:                 // Enum variant fields and enum discriminants alias each another.