setFocusable
Sets whether the window can be focused.
Platform-specific
macOS: If the window is already focused, it is not possible to unfocus it after calling
set_focusable(false). In this case, you might consider calling {@link Window.setFocus} but it will move the window to the back i.e. at the bottom in terms of z-order.
Parameters
focusable
Whether the window can be focused.