syntax_data: {"ast_node_type":"variable","tokens":[{"end":58,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if let Ok(deployment_target) = env::var(env_var) {
context_before:         // FIXME(madsmtm): Track changes to this.
context_after:             match apple::OSVersion::from_str(&deployment_target) {