code: function LatLng(properties) {
                  if (properties)
                      for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                          if (properties[keys[i]] != null)
                              this[keys[i]] = properties[keys[i]];
              }
docs: Properties of a LatLng.
  @memberof google.type
  @interface ILatLng
  @property {number|null} [latitude] LatLng latitude
  @property {number|null} [longitude] LatLng longitude
   
  Constructs a new LatLng.
  @memberof google.type
  @classdesc Represents a LatLng.
  @implements ILatLng
  @constructor
  @param {google.type.ILatLng=} [properties] Properties to set