Function ensureColumn

docs/app/js/sanddance-app.js:12193–12198

(role, quantitative, treemap)

    const firstQuantitative = nonInternal.filter((c)=>c.quantitative)[0];
    const firstQuantitativeColumnName = firstQuantitative && firstQuantitative.name;
    const ensureColumn = (role, quantitative, treemap)=>{
        if (!insightColumns[role]) {
            if (treemap) insightColumns[role] = getTreemapColumn(actualColumns).name;
            else insightColumns[role] = quantitative ? firstQuantitativeColumnName : firstColumnName;
        }
    };
    function checkRequiresSize() {
        switch(totalStyle){
            case "sum-strip":