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