code: func BoundingBoxIntWithPrecision(hash uint64, bits uint) Box {
  	fullHash := hash << (64 - bits)
  	latInt, lngInt := deinterleave(fullHash)
  	lat := decodeRange(latInt, 90)
  	lng := decodeRange(lngInt, 180)
  	latErr, lngErr := errorWithPrecision(bits)
  	return Box{
  		MinLat: lat,
  		MaxLat: lat + latErr,
  		MinLng: lng,
  		MaxLng: lng + lngErr,
  	}
  }
docs: // BoundingBoxIntWithPrecision returns the region encoded by the integer
  // geohash with the specified precision.