{"ast_node_type":"variable","tokens":[{"end":79,"kind":"keyword","start":0,"text":"let"}]}
    let metadata_stub_filename = if !tcx.sess.opts.unstable_opts.embed_metadata
    let metadata_filename = metadata_tmpdir.as_ref().join("full.rmeta");
        && !tcx.crate_types().contains(&CrateType::ProcMacro)