syntax_data: {"ast_node_type":"variable","tokens":[{"end":56,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let switch_targets = SwitchTargets::new(
context_before:                 let otherwise_block = target_block(TestBranch::Failure);
context_after:                     target_blocks.iter().filter_map(|(&branch, &block)| {