{"ast_node_type":"other","tokens":[{"end":15,"kind":"keyword","start":0,"text":"match"}]}
    match def {
pub(crate) fn trait_self_param_idx(db: &dyn DefDatabase, def: GenericDefId) -> Option<usize> {
        GenericDefId::TraitId(_) | GenericDefId::TraitAliasId(_) => {