stbl_(streamInfo) {
    const Mp4Generator = shaka.util.Mp4Generator;
    return Mp4Generator.box(
        'stbl',
        this.stsd_(streamInfo),
        Mp4Generator.box('stts', Mp4Generator.STTS_),
        Mp4Generator.box('stsc', Mp4Generator.STSC_),
        Mp4Generator.box('stsz', Mp4Generator.STSZ_),
        Mp4Generator.box('stco', Mp4Generator.STCO_));
  }
Generate a STBL box

@param {shaka.util.Mp4Generator.StreamInfo} streamInfo
@return {!Uint8Array}
@private