{"ast_node_type":"function","tokens":[{"end":62,"kind":"keyword","start":0,"text":"fn"}]}
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
impl fmt::Display for Diagnostic {
        writeln!(f, "#### {}\n\nSource: {}\n\n{}\n\n", self.id, self.location, self.doc)