Function find_opaque_ty_constraints_for_rpit 

pub(super) fn find_opaque_ty_constraints_for_rpit<'tcx>(
    tcx: TyCtxt<'tcx>,
    def_id: LocalDefId,
    owner_def_id: LocalDefId,
    opaque_types_from: DefiningScopeKind,
) -> EarlyBinder<'tcx, Ty<'tcx>>