syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"for"}]}
source_snippet:                 for binding in &first_sub_branch.bindings {
context_before:                 let first_sub_branch = branch.sub_branches.first().unwrap();
context_after:                     let local = self.var_local_id(binding.var_id, OutsideGuard);