Attempts to wrangle a UI blocker

// UI blocker library:
window.uiBlocker = (function() {
    // [ some private functions ]

    function show() {
        // ...
    }

    function hide() {
        // ...
    }

    return {
        show: show,
        hide: hide
    }
} () );

// Other components, which might go treading on each others' toes:
window.uiBlocker.show();
window.uiBlocker.hide();

// The way I'd LIKE it to work:
var miniController = window.uiBlocker.getMiniController();
    // This creates a new mini-controller for you. The UI controller will remember it in an array.
miniController.activate();
miniController.deactivate();
// As long as any mini-controller is in the active state, the UI blocker is present.
// Each time a mini-controller's altered, it signals the UI blocker controller to update.
// The UI blocker controller will check each of the mini-controllers it's handed out,
// and as long as any is active, it'll show up.