A string. The name of the device sending the tensor.
send_device_incarnation
An int. The current incarnation of send_device.
recv_device
A string. The name of the device receiving the tensor.
client_terminated
An optional bool. Defaults to False.
If set to true, this indicates that the node was added
to the graph as a result of a client-side feed or fetch of Tensor data,
in which case the corresponding send or recv is expected to be managed
locally by the caller.