{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"span:"}]}
                            span: args_lo.to(self.prev_token.span),
                        args: Some(P(ast::GenericArgs::Parenthesized(ast::ParenthesizedArgs {
                            inputs: decl.inputs.iter().map(|a| a.ty.clone()).collect(),