syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":")"}]}
source_snippet:     ) -> Option<Arc<SourceFile>> {
context_before:         stable_id: StableSourceFileId,
context_after:         self.files.borrow().stable_id_to_source_file.get(&stable_id).cloned()