code: function (dom, node) {
        return node &&
          dom.isBlock(node) &&
          !/^(TD|TH|CAPTION|FORM)$/.test(node.nodeName) &&
          !/^(fixed|absolute)/i.test(node.style.position) &&
          dom.getContentEditable(node) !== "true";
      }
docs: Returns true if the block can be split into two blocks or not