syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:         for arg_init in 0..body.arg_count {
context_before:     fn initialize_start_block(&self, body: &mir::Body<'tcx>, state: &mut Self::Domain) {
context_after:             state.insert(InitIndex::new(arg_init));