Notes about the app switcher (called the "app slider" on iOS 7), also known as the "task switcher" or "multitasking switcher".
Activating the app switcher
// Pre iOS 7
[[%c(SBUIController) sharedInstance] activateSwitcher];
// iOS 7
[[%c(SBUIController) sharedInstance] _activateAppSwitcherFromSide:2];
Toggling the app switcher
[[%c(SBUIController) sharedInstance] _toggleSwitcher];
Determining if switcher is visible/showing
[[%c(SBUIController) sharedInstance] isAppSwitcherShowing]