{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":".chain(nested_preds.into_iter().map(|pred|"}]}
                .chain(nested_preds.into_iter().map(|pred| goal.with(cx, pred)))
                .into_iter()
                .map(|goal| (GoalSource::ImplWhereBound, goal)),