code: function (position) {
    if (!_.has(position, "grow") && !_.has(position, "size")) {
      position = { grow: 1 };
    }
  
    return position;
  }
docs: Each layout consists of vertical panels, that contains its position and horizontal views. Flex-like positions of panels and views defined by 'grow' and 'size' parameters. View or panel with 'size' has exactly <size> height or width respectively. View or panel with 'grow' fills <grow> part of the residuary space (it works like flex-grow). By default, position = { grow: 1 }