syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"target_blocks.iter().filter_map(|(&branch,"}]}
source_snippet:                     target_blocks.iter().filter_map(|(&branch, &block)| {
context_before:                 let switch_targets = SwitchTargets::new(
context_after:                         if let TestBranch::Constant(_, bits) = branch {