def writeSequence(self, iovec):
        """
        Write some data, either directly to the underlying handle or, if TLS
        has been started, to the L{TLSMemoryBIOProtocol} for it to encrypt and
        send.

        @see: L{twisted.internet.interfaces.ITransport.writeSequence}
        """
        if self.disconnected:
            return
        if self.TLS:
            self.protocol.writeSequence(iovec)
        else:
            abstract.FileHandle.writeSequence(self, iovec)

        Write some data, either directly to the underlying handle or, if TLS
        has been started, to the L{TLSMemoryBIOProtocol} for it to encrypt and
        send.

        @see: L{twisted.internet.interfaces.ITransport.writeSequence}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/iocpreactor/tcp.py