/// <summary>
/// Sets the Accept media-type header value. To accept multiple media types,
/// this method can be called multiple times.
/// </summary>
/// <returns>Self reference for method chaining.</returns>
/// <param name="value">The media-type value.</param>
/// <param name="quality">The precedence of the value compared in relation to
/// other accept media-type values.</param>
public RequestHeaders AcceptMediaType(string value, double?quality = null)
{
var acceptValues = Accept?.ToList() ?? new List <HeaderValue>();
acceptValues.Add(HeaderValue.WithValue(value, quality));
Accept = acceptValues.ToArray();
return(this);
}