Bridge-Lanes

(bridge-lanes bridge) -> channel

Given a bridge, return a channel from which created lanes can be obtained.

>> (define a (make-channel))
:: [channel 573450]
>> (define b (make-channel))
:: [channel 53FDE0]
>> (define br (make-bridge a b))
:: [bridge [vector [dict] [dict] [channel 574310] [channel 574340]
    [channel 573450] [channel 53FDE0]]]
>> (bridge-lanes br)
:: [channel 574340]