private static void OnHeader(IHttpHeadersSink sink, object?state, ulong headerIndex)
        {
            PreparedHeader v = GetHeaderForIndex(headerIndex);

            OnHeader(sink, state, v._name._http2Encoded, v._value, HttpHeaderFlags.None);
        }
        private static void OnHeader(IHttpHeadersSink sink, object?state, ulong headerNameIndex, ReadOnlySpan <byte> headerValue, HttpHeaderFlags flags)
        {
            PreparedHeader v = GetHeaderForIndex(headerNameIndex);

            OnHeader(sink, state, v._name._http2Encoded, headerValue, flags);
        }
 /// <summary>
 /// Adds a header to the builder.
 /// </summary>
 /// <param name="header">The header to add.</param>
 public PreparedHeaderSetBuilder AddHeader(PreparedHeader header)
 {
     _headers.Add(header);
     return(this);
 }