/// <summary>
/// Return an initialised default Data Frame Header.
/// </summary>
/// <param name="sessionId"> for the header </param>
/// <param name="streamId"> for the header </param>
/// <param name="termId"> for the header </param>
/// <returns> byte array containing the header </returns>
public static UnsafeBuffer CreateDefaultHeader(int sessionId, int streamId, int termId)
{
var buffer = new UnsafeBuffer(new byte[HEADER_LENGTH]);
buffer.PutByte(VERSION_FIELD_OFFSET, CURRENT_VERSION);
buffer.PutByte(FLAGS_FIELD_OFFSET, (byte)BEGIN_AND_END_FLAGS);
buffer.PutShort(TYPE_FIELD_OFFSET, HDR_TYPE_DATA);
buffer.PutInt(SESSION_ID_FIELD_OFFSET, sessionId);
buffer.PutInt(STREAM_ID_FIELD_OFFSET, streamId);
buffer.PutInt(TERM_ID_FIELD_OFFSET, termId);
buffer.PutLong(RESERVED_VALUE_OFFSET, DEFAULT_RESERVE_VALUE);
return buffer;
}