code: func (geoIndex *geoIndex) Range(topLeft Point, bottomRight Point) []interface{} {
  	topLeftIndex := cellOf(topLeft, geoIndex.resolution)
  	bottomRightIndex := cellOf(bottomRight, geoIndex.resolution)
  
  	return geoIndex.get(bottomRightIndex.x, topLeftIndex.x, topLeftIndex.y, bottomRightIndex.y)
  }
docs: // Range returns the index entries within lat, lng range.