How to toggle KE Disable Built-in Keyboard setting?

Anybody know how to toggle Karabiner-Elements Disable Built-in Keyboard setting?
I want to toggle the setting so that I can use one keyboard at a time and switch to another at the other time(never use them both at the same time).
Thank you for helping.

Are there some defaults write org.pqrs.Karabiner-Elements.Preferences disableBuiltInKeyboard Yes thing?

disable_built_in_keyboard_if_exists in karabiner.json.

karabiner.json file path: ~/.config/karabiner/karabiner.json