syntax_data: {"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:     if let Ok(path) = env::var(&*ENV_LLVM_PREFIX) {
context_before:     println!("cargo:rerun-if-env-changed={}", &*ENV_LLVM_PREFIX);
context_after:         println!("cargo:rerun-if-changed={}", path);