code: function _getNextSiblingThatIsNotBlank(node) {
      var nextSibling = node.nextSibling;
      while (nextSibling && _isBlankTextNode(nextSibling)) {
        nextSibling = nextSibling.nextSibling;
      }
      return nextSibling;
    }
docs: Returns next sibling node that is not a blank text node