syntax_data: {"ast_node_type":"variable","tokens":[{"end":79,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if let Some(user_ty) = self.user_args_applied_to_ty_of_hir_id(hir_id) {
context_after:             debug!("lower_variant_or_leaf: kind={:?} user_ty={:?} span={:?}", kind, user_ty, span);