syntax_data: {"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let next = self.places.push(PlaceInfo::new(ty, Some(elem)));
context_before:         *self.projections.entry((base, elem)).or_insert_with(|| {
context_after:             self.places[next].next_sibling = self.places[base].first_child;