/// <summary>
 /// Test explicitly optional string. Please put a header 'headerParameter'
 /// =&gt; null.
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='bodyParameter'>
 /// </param>
 public static void PostOptionalStringHeader(this IExplicitModel operations, string bodyParameter = default(string))
 {
     operations.PostOptionalStringHeaderAsync(bodyParameter).GetAwaiter().GetResult();
 }