A sub pane for modal control elements.
只读
Unique identifier for the pane.
Check visibility of the pane
可选
Adds a togglable boolean item to the pane.
Adds a button to the pane and binds the specified action to the button activation.
Adds a pane for grouped button layout.
Adds an divider item to the pane.
Hide the pane.
Show the pane and all of its items.
A sub pane for modal control elements.