syntax_data: {"ast_node_type":"variable","tokens":[{"end":91,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let mut storage_conflicts = BitMatrix::new(saved_locals.count(), saved_locals.count());
context_before:     // simpler to keep it this way for now.
context_after:     for (saved_local_a, local_a) in saved_locals.iter_enumerated() {