/// <summary>
 /// Returns the <see cref="GeocodingHttpClient"/> of the specified Google OAuth <paramref name="client"/>.
 /// </summary>
 /// <param name="client">The Google OAuth client.</param>
 /// <returns>An instance of <see cref="GeocodingHttpClient"/>.</returns>
 /// <remarks>
 /// The <see cref="GeocodingHttpClient"/> instance keeps an internal registry ensuring that calling this method
 /// multiple times for the same <paramref name="client"/> will result in the same instance of
 /// <see cref="GeocodingHttpClient"/>.
 ///
 /// Specifically the <see cref="GeocodingHttpClient"/> instance will be created the first time this method is
 /// called, while any subsequent calls to this method will result in the instance saved registry being
 /// returned.
 /// </remarks>
 public static GeocodingHttpClient Geocoding(this GoogleOAuthClient client)
 {
     if (client == null)
     {
         throw new ArgumentNullException(nameof(client));
     }
     return(client.GetApiClient(() => new GeocodingHttpClient(client)));
 }
 /// <summary>
 /// Returns the <see cref="PlacesHttpClient"/> of the specified Google OAuth <paramref name="client"/>.
 /// </summary>
 /// <param name="client">The Google OAuth client.</param>
 /// <returns>An instance of <see cref="PlacesHttpClient"/>.</returns>
 /// <remarks>
 /// The <see cref="PlacesHttpClient"/> instance keeps an internal registry ensuring that calling this method
 /// multiple times for the same <paramref name="client"/> will result in the same instance of
 /// <see cref="PlacesHttpClient"/>.
 ///
 /// Specifically the <see cref="PlacesHttpClient"/> instance will be created the first time this method is
 /// called, while any subsequent calls to this method will result in the instance saved registry being
 /// returned.
 /// </remarks>
 public static PlacesHttpClient Places(this GoogleOAuthClient client)
 {
     if (client == null)
     {
         throw new ArgumentNullException(nameof(client));
     }
     return(client.GetApiClient(() => new PlacesHttpClient(client)));
 }