DummyChannelConsumer consumes data from the 'in' channel until it is closed.

AddInput adds one or more input channels to the ChannelDeMux.

NewChannelMux[T] initializes and returns a new instance of ChannelMux[T].

ChannelDeMux collects data from multiple input channels and forwards it to a single output channel.

ChannelMux[T] multiplexes data from a single input channel to multiple output channels concurrently.