code: def Command(cls, usb, service, command='', timeout_ms=None):
          
          return ''.join(cls.StreamingCommand(usb, service, command, timeout_ms))
docs: One complete set of USB packets for a single command.
  
          Sends service:command in a new connection, reading the data for the
          response. All the data is held in memory, large responses will be slow and
          can fill up memory.
  
          Args:
            usb: USB device handle with BulkRead and BulkWrite methods.
            service: The service on the device to talk to.
            command: The command to send to the service.
            timeout_ms: Timeout for USB packets, in milliseconds.
  
          Raises:
            InterleavedDataError: Multiple streams running over usb.
            InvalidCommandError: Got an unexpected response command.
  
          Returns:
            The response from the service.