docs: def geo_distance_range(cls, field, center, from_distance, to_distance, distance_type=None):
          '''
          http://www.elasticsearch.org/guide/reference/query-dsl/geo-distance-range-filter.html
          Filters documents that exists within a range from a specific point
  
  
          '''
          instance = cls(geo_distance_range={'from': from_distance, 'to': to_distance, field: center})
          if distance_type is not None:
              instance['geo_distance_range']['distance_type'] = distance_type
          return instance