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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_adb_detectable(self):
 """Checks if USB is on and device is ready by verifying adb devices."""

        serials = list_adb_devices()
        if self.serial in serials:
            self.log.debug('Is now adb detectable.')
            return True
        return False