syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"#[instrument(level"}]}
source_snippet:     #[instrument(level = "debug", skip(self), ret)]
context_before:     /// that the mapping is correct (e.g. by checking the file content hash).
context_after:     fn reverse_map_prefix_heuristically(&self, path: &Path) -> Option<PathBuf> {