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send: Sending a Message

c.send(m)
  OutChannel c
  Message m
s.send(m)
  OutChannelSet s
  Message m

The first variant sends a message m to the output channel c; if the receiver node linked to c is blocked, this node is released.

The second variant sends m to all output channels in set s.

In both variants, the sender node is not blocked even if the receiver node linked to the corresponding channel is not ready to receive m. Consequently, c may hold an arbitrary number of messages.