What is the default value for action taken when CPU temp is too low / high?

In the API there is set_cpu_temp_action.

I wonder what is the default action if I never call this method. Is it “Do nothing.”? It’s nicely mentioned e.g. in set_cpu_low_temp_threshold, set_cpu_high_temp_threshold or set_battery_voltage_action what is the default value if this method is never called and I somehow miss it for set_cpu_temp_action.

Thanks in advance!

Moreover - can I somehow read the current setting?

I don’t see anything like get_cpu_temp_action that would return e.g. 0 or 1 for “do nothing” or “self-destruct”.