syntax_data: {"ast_node_type":"function","tokens":[{"end":80,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn try_get_len(&self, place: PlaceRef<'_>, map: &Map<'_>) -> Option<V> {
context_before:     /// Retrieve the slice length stored for a place, or `None` if it is not tracked.
context_after:         let place = map.find_len(place)?;