{"ast_node_type":"other","tokens":[{"end":3,"kind":"keyword","start":0,"text":"///"}]}
///
/// For example, a macro parameter of `$( { $( $foo:ident ),* } )*` called with `{ a, b } { c }`:
/// * `[ $( ${count(foo)} ),* ]` will return [2, 1] with a, b = 2 and c = 1