{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"if"}]}
                if separated && (self.check(exp!(Colon)) | self.check(exp!(Eq))) {
                    self.check_noexpect(&token::Colon) || self.check_noexpect(&token::Eq);
                    let arg_span = arg.span();