code: func NewBoundFromGeoHashInt64(hash int64, bits int) *Bound {
  	west, east, south, north := geoHashInt2ranges(hash, bits)
  	return NewBound(west, east, south, north)
  }
docs: // NewBoundFromGeoHashInt64 creates a new bound from the region defined by the GeoHesh.
  // bits indicates the precision of the hash.