{"ast_node_type":"variable","tokens":[{"end":53,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(index) = stack.find(INST_BUILD) {
        const INST_BUILD: &str = "<cranelift_frontend::frontend::FuncInstBuilder as cranelift_codegen::ir::builder::InstBuilderBase>::build";
            stack = &stack[..index + INST_BUILD.len()];