syntax_data: {"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"vacant.insert(ExternEntry::new(ExternLocation::ExactPaths(files)))"}]}
source_snippet:                     vacant.insert(ExternEntry::new(ExternLocation::ExactPaths(files)))
context_before:                     let files = BTreeSet::from_iter(iter::once(path));
context_after:                 }