syntax_data: {"ast_node_type":"variable","tokens":[{"end":85,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let loc = Location { block: bb, statement_index: data.statements.len() };
context_before:         for (bb, data) in body.basic_blocks.iter_enumerated() {
context_after:             let terminator = data.terminator();