AsColletion.swift

for item in toolbarItems! {
  if let barButtonItem = item as? UIBarButtonItem {
    // Do something with UIBarButtonItem
  }
  
  if let segmentedControl = item as? UISegmentedControl {
    // Do something with UISegmentedControl
  }
}

for object in JSON as [NSDictionary] {
  // Do something with JSON object
}