PanelToggleButton

The panel.toggle_button.ToggleButton is a button used to toggle the visibility of a panel.dock.Dock area.

<picture> <source srcset="toggle-button-dark.png" media="(prefers-color-scheme: dark)"> <img src="toggle-button.png" alt="toggle-button"> </picture>

It will automatically reveal or hide the specified area from panel.toggle_button.ToggleButton.dock.