{"ast_node_type":"function","tokens":[{"end":94,"kind":"keyword","start":0,"text":"fn"}]}
    fn inline_literals<'fmt>(&self, mut fmt: Cow<'fmt, FormatArgs>) -> Cow<'fmt, FormatArgs> {
    /// `format_args!("Hello, World! 123 {}", x)`.
        let mut was_inlined = vec![false; fmt.arguments.all_args().len()];