def METHOD_NAME(self, stream, pdu):
    """
    Write the FormatDataRequestPDU starting at dataLen. Assumes LongFormatNames.
    :type stream: BytesIO
    :type pdu: FormatDataRequestPDU
    """
    Uint32LE.pack(4, stream)  # datalen
    Uint32LE.pack(pdu.requestedFormatId, stream)