{"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
    let pass_name = profiler.get_or_alloc_cached_string(pass_name);
fn llvm_args_to_string_id(profiler: &SelfProfiler, pass_name: &str, ir_name: &str) -> EventId {
    let mut components = vec![StringComponent::Ref(pass_name)];