syntax_data: {"ast_node_type":"other","tokens":[{"end":23,"kind":"keyword","start":0,"text":"macro_rules!"}]}
source_snippet: macro_rules! hash_opt {
context_after:     ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, $_for_crate_hash: ident, [UNTRACKED]) => {{}};