syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"Arc::clone(&(*self.files.borrow().source_files)[idx])"}]}
source_snippet:         Arc::clone(&(*self.files.borrow().source_files)[idx])
context_before:         let idx = self.lookup_source_file_idx(pos);
context_after:     }