code: function _getMarkerCfg(cfg) {
    return {
      symbol: function symbol(x, y) {
        return [['M', x - 5.5, y - 4], ['L', x + 5.5, y - 4], ['L', x + 5.5, y + 4], ['L', x - 5.5, y + 4]];
      },
  
      radius: 5,
      fill: cfg.color,
      fillOpacity: 0.3
    };
  }
docs: get marker cfg