syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"files.sort_by(|(lhs,"}]}
source_snippet:         files.sort_by(|(lhs, _), (rhs, _)| lhs.cmp(rhs));
context_before:         };
context_after:         let files = FilesIndex(files);