Function setExtent2

src/scale/scaleMapper.ts:468–477

(kind, start, end)

    },

    setExtent2(kind, start, end) {
        if (__DEV__) {
            assert(!this._frozen);
        }
        const extentList = this._extents;
        if (!extentList[kind]) {
            extentList[kind] = extentList[SCALE_EXTENT_KIND_EFFECTIVE].slice();
        }
        writeExtent(extentList, kind, start, end);
    },

    freeze() {
        if (__DEV__) {