syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"prints.extend(matches.opt_strs(\"print\").into_iter().map(|req|"}]}
source_snippet:     prints.extend(matches.opt_strs("print").into_iter().map(|req| {
context_after:         let (req, out) = split_out_file_name(&req);