public static async Task<TwitterResponseCollection<TrendsAvailableLocationsResponse>> GetTrendsAvailableLocations(this ITwitterSession session)
{
var parameters = new TwitterParametersCollection();
return await session.GetAsync(TwitterApi.Resolve("/1.1/trends/available.json"), parameters)
.ContinueWith(c => c.MapToMany<TrendsAvailableLocationsResponse>());
}