def RebootBootloader(self, timeout_ms=None):
    return self._SimpleCommand('reboot-bootloader', timeout_ms=timeout_ms)
The device_id property.
dataset/ETHPy150Open google/python-adb/adb/fastboot.py/FastbootCommands.RebootBootloader--crossover with--dataset/ETHPy150Open Microsoft/ApplicationInsights-Python/applicationinsights/channel/contracts/Envelope.py/Envelope.device_id