syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // FIXME(eddyb) print this with `print_def_path`.
context_before:                 if self.should_print_verbose() {
context_after:                     write!(self, "Opaque({:?}, {})", def_id, args.print_as_list())?;