CompositeDisposable-remove-dispose-example.swift

let disposable1 = Disposables.create { print("disposed-1 ☠️") }
let disposable2 = Disposables.create { print("disposed-2 ☠️") }
let disposable3 = Disposables.create { print("disposed-3 ☠️") }

let disposable = CompositeDisposable(disposable1, disposable2)

print("insert disposable3")
let key3 = disposable.insert(disposable3)

if let key = key3 {
    print("remove disposable3")
    disposable.remove(for: key)
}

print("dispose")
disposable.dispose()

// log:
// insert disposable3
// remove disposable3
// disposed-3 ☠️
// dispose
// disposed-1 ☠️
// disposed-2 ☠️