<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def close(self):
 """Close and potentially disconnect from a device."""


        if self.hwman.stream.connected:
            self.hwman.disconnect()

        self.hwman.close()
        self.opened = False