{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"self,"}]}
    self, CanonicalUserTypeAnnotation, CanonicalUserTypeAnnotations, CoroutineArgsExt,
use rustc_middle::ty::{
    GenericArgsRef, OpaqueHiddenType, OpaqueTypeKey, RegionVid, Ty, TyCtxt, TypeVisitableExt,