registerUnaryCallback abstract method

ZoneUnaryCallback<R, T> registerUnaryCallback<R, T>(R callback(T arg))

Registers the given callback in this zone.

Similar to registerCallback but with a unary callback.

Source

ZoneUnaryCallback<R, T> registerUnaryCallback<R, T>(R callback(T arg));

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