How to use the plotink.ebb_serial.min_version function in plotink

def queryVoltage(port_name):
    # Query the EBB motor power supply input voltage.
    if port_name is not None:
        version_status = ebb_serial.min_version(port_name,"2.2.3")
        if not version_status:
            return True # Unable to read version, or version is below 2.2.3.
                        # In these cases, issue no voltage warning.
        else:
            raw_string = (ebb_serial.query(port_name, 'QC\r'))
            split_string = raw_string.split(",", 1)
            split_len = len(split_string)
            if split_len > 1:
                voltage_value = int(split_string[1])  # Pick second value only
            else:
                return True  # We haven't received a reasonable voltage string response.
                # Ignore voltage test and return.
            # Typical reading is about 300, for 9 V input.
            if voltage_value < 250:
                return False
    return True

# The EBB will cut power to the pen-lift servo motor after a given
    # time delay since the last X/Y/Z motion command.
    # It can also optionally set an immediate on/off state.
    # 
    # The time delay timeout_ms is given in ms. A value of 0 will
    # disable the automatic power-off feature.
    #
    # The state parameter is given as 0 or 1, to turn off or on
    # servo power immediately, respectively.
    #
    # This feature requires EBB hardware v 2.5.0 and firmware 2.6.0
    #
    # Reference: http://evil-mad.github.io/EggBot/ebb.html#SR
    #
    if port_name is not None:
        version_status = ebb_serial.min_version(port_name,"2.6.0")
        if not version_status:
            return      # Unable to read version, or version is below 2.6.0.
        else:
            if state is None:
                str_output = 'SR,{0}\r'.format(timeout_ms)
            else:
                str_output = 'SR,{0},{1}\r'.format(timeout_ms, state)
            ebb_serial.command(port_name, str_output)