{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"self[i].as_type().unwrap_or_else(||"}]}
        self[i].as_type().unwrap_or_else(|| bug!("expected type for param #{} in {:?}", i, self))
    pub fn type_at(&self, i: usize) -> Ty<'tcx> {
    }