parse(start, count) {
    const {_cachedMeta: meta, _data: data} = this;
    const {iScale, _stacked} = meta;
    const iAxis = iScale.axis;

    let sorted = start === 0 && count === data.length ? true : meta._sorted;
    let prev = start > 0 && meta._parsed[start - 1];
    let i, cur, parsed;

    if (this._parsing === false) {
      meta._parsed = data;
      meta._sorted = true;
      parsed = data;
    } else {
      if (isArray(data[start])) {
        parsed = this.parseArrayData(meta, data, start, count);
      } else if (isObject(data[start])) {
        parsed = this.parseObjectData(meta, data, start, count);
      } else {
        parsed = this.parsePrimitiveData(meta, data, start, count);
      }

      const isNotInOrderComparedToPrev = () => cur[iAxis] === null || (prev && cur[iAxis] < prev[iAxis]);
      for (i = 0; i < count; ++i) {
        meta._parsed[i + start] = cur = parsed[i];
        if (sorted) {
          if (isNotInOrderComparedToPrev()) {
            sorted = false;
          }
          prev = cur;
        }
      }
      meta._sorted = sorted;
    }

    if (_stacked) {
      updateStacks(this, parsed);
    }
  }
@param {number} start
@param {number} count