syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // Convert and filter the inhabited alternatives.
context_before:             Tree::Alt(alts) => {
context_after:                 let mut alts = alts.into_iter().map(Self::from_tree).filter_map(Result::ok);