{"ast_node_type":"variable","tokens":[{"end":36,"kind":"keyword","start":0,"text":"let"}]}
        let snap = state.snapshot();
    if let Ok(vfs_path) = from_proto::vfs_path(&params.text_document.uri) {
        let file_id = try_default!(snap.vfs_path_to_file_id(&vfs_path)?);