syntax_data: {"ast_node_type":"variable","tokens":[{"end":56,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let mut candidate = sysroot.path().join(suffix);
context_before:     let real_source_base_dir = |suffix: &str, confirm: &str| {
context_after:         if let Ok(metadata) = candidate.symlink_metadata() {