syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"#[derive(Copy,"}]}
source_snippet: #[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
context_before: /// Although only field projections are currently allowed, this could change in the future.
context_after: pub enum TrackElem {