{"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"macro_rules!"}]}
macro_rules! throw_span_err {
/// For methods that return a `Result<_, DiagnosticDeriveError>`:
    ($span:expr, $msg:expr) => {{ throw_span_err!($span, $msg, |diag| diag) }};