{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"offset_of:"}]}
    offset_of: InternedSet<'tcx, List<(VariantIdx, FieldIdx)>>,
    captures: InternedSet<'tcx, List<&'tcx ty::CapturedPlace<'tcx>>>,
    valtree: InternedSet<'tcx, ty::ValTreeKind<'tcx>>,