A number that specifies the tag id of the popup menu item to replace with the content of the array.
This value allows you to use a popup menu that contains both static and bindings generated items.
static let continuouslyUpdatesValue: NSBindingOption
NSNumber object containing a Boolean value that determines whether the value of the binding is updated as edits are made to the user interface item or is updated only when the user interface item resigns as the responder.
static let raisesForNotApplicableKeys: NSBindingOption
NSNumber object containing a Boolean value that specifies if an exception is raised when the binding is bound to a key that is not applicable—for example when an object is not key-value coding compliant for a key.