docs: function removeDupProperties(selector) {
    // Remove duplicated properties from bottom to top ()
    for (let actIndex = selector.nodes.length - 1; actIndex >= 1; actIndex--) {
      for (let befIndex = actIndex - 1; befIndex >= 0; befIndex--) {
        if (selector.nodes[actIndex].prop === selector.nodes[befIndex].prop) {
          selector.nodes[befIndex].remove();
          actIndex--;
        }
      }
    }
  }