/// <summary>
/// Send a post request with header values "scenario": "valid", "value":
/// "GREY" or "scenario": "null", "value": null
/// </summary>
/// <param name='operations'>
/// The operations group for this extension method.
/// </param>
/// <param name='scenario'>
/// Send a post request with header values "scenario": "valid" or "null" or
/// "empty"
/// </param>
/// <param name='value'>
/// Send a post request with header values 'GREY' . Possible values for this
/// parameter include: 'White', 'black', 'GREY'
/// </param>
/// <param name='cancellationToken'>
/// The cancellation token.
/// </param>
public static async Task ParamEnumAsync(this IHeader operations, string scenario, GreyscaleColors?value = default(GreyscaleColors?), CancellationToken cancellationToken = default(CancellationToken))
{
await operations.ParamEnumWithHttpMessagesAsync(scenario, value, null, cancellationToken).ConfigureAwait(false);
}
