{"ast_node_type":"import","tokens":[{"end":22,"kind":"keyword","start":0,"text":"use"}]}
use rustc_middle::bug;
use rustc_infer::traits::{ObligationCause, ObligationCauseCode, WellFormedLoc};
use rustc_middle::ty::{self, TyCtxt, TypeVisitableExt, TypingMode, fold_regions};