{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"self,"}]}
    self, AssocItem, AssocItemContainer, GenericArgs, GenericArgsRef, GenericParamDefKind,
use rustc_middle::ty::{
    ParamEnvAnd, Ty, TyCtxt, TypeVisitableExt, Upcast,