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This Question is posted by at 15-04-2019 04:21:41

Hello, i want to use CountdownTimer but i don't know how to include it. it exist in the official docs…/CountdownTimer/CountdownTimer.html, but when i write it in my project it says "The method 'CountdownTimer' is not is not defined for the class ...", i did import async package but still got that error


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