syntax_data: {"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let State::Reachable(values) = self else { return };
context_before:     pub fn insert_value_idx(&mut self, target: PlaceIndex, value: V, map: &Map<'_>) {
context_after:         if let Some(value_index) = map.places[target].value_index {