Function isStacked

src/core/core.datasetController.js:119–122

(scale, meta)

}

function isStacked(scale, meta) {
  const stacked = scale && scale.options.stacked;
  return stacked || (stacked === undefined && meta.stack !== undefined);
}

function getStackKey(indexScale, valueScale, meta) {
  return `${indexScale.id}.${valueScale.id}.${meta.stack || meta.type}`;