syntax_data: {"ast_node_type":"variable","tokens":[{"end":48,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let target_dir = std::env::var("QNX_TARGET")
context_before: fn get_iosock_param(arch_lib_dir: &str) -> &'static str {
context_after:         .unwrap_or_else(|_| "QNX_TARGET_not_set_please_source_qnxsdp-env.sh".into());