Registers the given callback in this zone.
Similar to registerCallback but with a unary callback.
ZoneBinaryCallback<R, T1, T2> registerBinaryCallback<R, T1, T2>( R callback(T1 arg1, T2 arg2));
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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-async/Zone/registerBinaryCallback.html