I will start new thread since this question is deprecated How to read Finder icons (left source list) on OS X using Swift as Apple source code says:
@available(OSX, introduced=10.5, deprecated=10.11, message="This functionality is no longer supported on OS X.")
public func LSSharedFileListCreate(inAllocator: CFAllocator!, _ inListType: CFString!, _ listOptions: AnyObject!) -> Unmanaged<LSSharedFileList>!
What is the proper way to implement this solution in OS X 10.11 El Capitan?