syntax_data: {"ast_node_type":"function","tokens":[{"end":19,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn update_bits(
context_before: impl<'a, 'tcx> MaybeInitializedPlaces<'a, 'tcx> {
context_after:         state: &mut <Self as Analysis<'tcx>>::Domain,