{"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"err.help("}]}
                                err.help(
                            if let Ok(true) = field_is_format_named_arg {
                                    format!("you might have meant to use the available field in a format string: `\"{{}}\", self.{}`", segment.ident.name),