'Send a amp.Box to my peer.
Note: transport.write is never called outside of this method.
@param box: an AmpBox.
@raise ProtocolSwitched: if the protocol has previously been switched.
@raise ConnectionLost: if the connection has previously been lost.'

def sendBox(self, box):

    if self._locked:
        raise ProtocolSwitched('This    connection    has    switched:    no    AMP    traffic    allowed.')
    if (self.transport is None):
        raise ConnectionLost()
    if (self._startingTLSBuffer is not None):
        self._startingTLSBuffer.append(box)
    else:
        self.transport.write(box.serialize())
