 	func hookupToToolbarItems(_ handler: ToolbarItemHandler, window: NSWindow)
 }
 
-@available(macOS, introduced: 10.12)
+@available(macOS 10.12, *)
 protocol ToolbarDelegatingOwner : class {
 	//should be called when views have loaded
 	func assignHandlers(_ rootController: NSViewController, items: [NSToolbarItem])

	func assignUnclaimedToolbarItems(_ toolbar: NSToolbar, handler: ToolbarItemHandler)
}

@available(macOS, introduced: 10.12)
extension ToolbarItemHandler {
	func hookupToToolbarItems(_ handler: ToolbarItemHandler, window: NSWindow) {
		//find owner

// This file should only be included in macOS targets
#if os(macOS)
import Cocoa
import ClientCore
#endif

@available(macOS 10.12, *)
protocol ToolbarItemHandler : class {
	///called by a top level controller for each toolbar item no one has claimed
	func handlesToolbarItem(_ item: NSToolbarItem) -> Bool
