function on_load() {
        const config = {
          editable: true,
          plugin: "Y Bar",
          columns: ["Profit"],
          "row-pivots": ["Order Date"],
          "column-pivots": ["Profit"],
          selectable: null,
          aggregates: null,
          filters: null,
          sort: null,
          plugin_config: {},
        };
        var el = document.getElementsByTagName("perspective-viewer")[0];
        WORKER.table(this.response, { limit: 10 }).then((table) => {
          el.load(table);
          el.toggleConfig();
          el.restore(config);
        });
      }