pub(crate) fn check_parent_of_field<'cx, 'tcx>(
    this: &mut MirBorrowckCtxt<'cx, 'tcx>,
    location: Location,
    base: PlaceRef<'tcx>,
    span: Span,
    flow_state: &BorrowckAnalyses<BitSet<BorrowIndex>, ChunkedBitSet<MovePathIndex>, ChunkedBitSet<InitIndex>>
)