Method expireCache

src/base/base-mixin.js:1374–1377

* Expire the internal chart cache. dc charts cache some data internally on a per chart basis to * speed up rendering and avoid unnecessary calculation; however it might be useful to clear the * cache if you have changed state which will affect rendering. For example, if you invoke *

()

     * @returns {BaseMixin}
     */
    expireCache () {
        // do nothing in base, should be overridden by sub-function
        return this;
    }

    /**
     * Attach a Legend widget to this chart. The legend widget will automatically draw legend labels