def METHOD_NAME(self):
    """
    Retrieves the firmware version of module
    Returns:
        string: The firmware versions of the module
    """
    fw_version = None
    if self.name == "BIOS":
        fw_version = self.__get_bios_version()
    elif "CPLD" in self.name:
        cpld_version = self.__get_cpld_version()
        fw_version = cpld_version.get(self.name)
    return fw_version