code: function getBorderSpacing(el) {
    el = $(el);
  
    let css = el.css('border-spacing'); // '0px 0px'
    let [horizontal, vertical] = css.split(' ');
  
    return {
      horizontal: parseFloat(horizontal),
      vertical: parseFloat(vertical)
    };
  }
docs: Gets a numeric border-spacing values for a given element.
  
  @method getBorderSpacing
  @param {Element} element
  @return {Object}
  @private