/**
 * trims range, but does *not* adjust it
 * returns a new range if there is one, or null, if it is trimmed completely
 * @param  {object} subRange  {start:
 *                                  end:
 *                                  }
 * @param  {object} containerRange {start:
 *                                  end:
 *                                  }
 * @param  {int} sequenceLength
 * @return {object} || null        {start:
 *                                  end:
 *                                  }
 */
export default function trimRangeByAnotherRange(rangeToBeTrimmed: any, trimmingRange: any, sequenceLength: int): object;