registerBinaryCallback abstract method

ZoneBinaryCallback<R, T1, T2> registerBinaryCallback<R, T1, T2>(R callback(T1 arg1, T2 arg2))

Registers the given callback in this zone.

Similar to registerCallback but with a unary callback.

Source

ZoneBinaryCallback<R, T1, T2> registerBinaryCallback<R, T1, T2>(
    R callback(T1 arg1, T2 arg2));

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https://api.dartlang.org/stable/1.24.3/dart-async/Zone/registerBinaryCallback.html