syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"self.files.borrow().stable_id_to_source_file.get(&stable_id).cloned()"}]}
source_snippet:         self.files.borrow().stable_id_to_source_file.get(&stable_id).cloned()
context_before:     ) -> Option<Arc<SourceFile>> {
context_after:     }