/// <summary>
/// Update a specific Function resource.
/// </summary>
/// <param name="options"> Update Function parameters </param>
/// <param name="client"> Client to make requests to Twilio </param>
/// <returns> Task that resolves to A single instance of Function </returns>
public static async System.Threading.Tasks.Task <FunctionResource> UpdateAsync(UpdateFunctionOptions options,
ITwilioRestClient client = null)
{
client = client ?? TwilioClient.GetRestClient();
var response = await client.RequestAsync(BuildUpdateRequest(options, client));
return(FromJson(response.Content));
}