{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"///"}]}
    /// called with the HirId for the `{ ... }` anon const
    /// Returns the HirId of `N` in `struct Foo<const N: usize = { ... }>` when
    pub fn hir_opt_const_param_default_param_def_id(self, anon_const: HirId) -> Option<LocalDefId> {