/// <summary>
/// Adds headers to the built HTTP request message.
/// </summary>
/// <param name="headers">Headers represented by HttpRequestHeaders type.</param>
/// <returns>The same HTTP request message builder.</returns>
public IAndHttpRequestMessageBuilder WithHeaders(HttpRequestHeaders headers)
{
headers.ForEach(h => this.requestMessage.Headers.Add(h.Key, h.Value));
return this;
}