/// <summary>
/// Test explicitly optional string. Please put a header 'headerParameter'
/// => null.
/// </summary>
/// <param name='operations'>
/// The operations group for this extension method.
/// </param>
/// <param name='bodyParameter'>
/// </param>
/// <param name='cancellationToken'>
/// The cancellation token.
/// </param>
public static async Task PostOptionalStringHeaderAsync(this IExplicitModel operations, string bodyParameter = default(string), CancellationToken cancellationToken = default(CancellationToken))
{
await operations.PostOptionalStringHeaderWithHttpMessagesAsync(bodyParameter, null, cancellationToken).ConfigureAwait(false);
}